Output on new line WITHOUT for loop

Output on new line WITHOUT for loop - java

I am trying to output arrays on a new line through a basic client, server application. However, to accomplish this I have had to use substring to find the # after each word to signal the end of the line. However I want to remove this function and have each section on a new line.
public ClientHandler(Socket socket,Users newUser, int newClientUser)
throws IOException
{
client = socket;
input = new Scanner(client.getInputStream());
output = new PrintWriter(
client.getOutputStream(),true);
user = newUser;
clientUser = newClientUser;
String[] itemName = {user.getItemName(1), user.getItemName(2)};
String[] description = {user.getItemDescription(1), user.getItemDescription(2)};
String[] itemtime = {user.getItemTime(1), user.getItemTime(2)};
output.println(itemName[0] + "#" + itemName[1]
+ "#" + "Welcome To The Auction User:" + clientUser
+ itemName[0] +": "+ description[0] +
"#"+ itemName[1] +": "+description[1]+
"#"+ "Deadline For " + itemName[0] + ": "
+ itemtime[0] + "#" +"Deadline For " +
itemName[1] + ": " + itemtime[1]+"#");
}
private synchronized void getMessage(String response)
{
String message="";
for(int i= count; !response.substring(i, i+1).equals("#"); i++)
{
count = i;
}
}

output.println(itemName[0] + "\n" + itemName[1]
+ "\n" + "Welcome To The Auction User:" + clientUser
+ itemName[0] +": "+ description[0] +
"\n"+ itemName[1] +": "+description[1]+
"\n"+ "Deadline For " + itemName[0] + ": "
+ itemtime[0] + "\n" +"Deadline For " +
itemName[1] + ": " + itemtime[1]+"\n");
Instead of having a "#" signify a new line, you can use "\n". Java will read that from your string as a new line.

Related

how to simulate Excel control codes in String

One web project I'm involved in requires generating a CSV to the user.
One field is notes and there can be multiple notes in the field, separated by a return (alt-enter in Excel), appearing as
A USER entered on 02/17/2023: Test note
A USER entered on 02/17/2023: This is another note
Is it possible to insert control codes into a Java string that Excel will pick up and format the cell properly?
For what it's worth, this was my attempt:
}else if (formType.equalsIgnoreCase("downloadCSV")) {
Date d = new Date();
String filename = "C:/temp/rtTmp" + d.getTime() + ".csv";
File f = new File(filename);
List<Contact> contactList = RetentionTrackDatabaseUtil.getContacts();
BufferedWriter bw = new BufferedWriter(new FileWriter(f));
bw.write("name,"
+ "gender,"
+ "age,"
+ "DOB,"
+ "DOH,"
+ "DOR,"
+ "DOS,"
+ "dateContact,"
+ "reason,"
+ "status,"
+ "empNum,"
+ "shift,"
+ "phone,note(s)\n");
for (Contact c : contactList) {
System.out.println(c.getAge());
bw.append("\"" + c.getName() + "\"" + ","
+ c.getGender() + ","
+ Integer.toString(c.getAge()) + ","
+ (c.getDOB()!=null?RetentionTrackUtil.sdf.format(c.getDOB()):"") + ","
+ (c.getDOH()!=null?RetentionTrackUtil.sdf.format(c.getDOH()):"") + ","
+ (c.getDOR()!=null?RetentionTrackUtil.sdf.format(c.getDOR()):"") + ","
+ (c.getDOS()!=null?RetentionTrackUtil.sdf.format(c.getDOS()):"") + ","
+ (c.getDateContact()!=null?RetentionTrackUtil.sdf.format(c.getDateContact()):"") + ","
+ c.getReason() + ","
+ c.getStatus() + ","
+ c.getEmpNum() + ","
+ c.getShift() + ","
+ c.getPhone() + ",");
for(Note n: c.getNoteList()){
bw.append("(" + n.getEnteredBy() + " on " + RetentionTrackUtil.sdf.format(n.getNoteDate()) + ")" + n.getNote() + "\\n");
}
bw.append("\n");
}
bw.close();
sendFile(response, filename);
}

Java - Obtain text within script tag

How to get value https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35 in this script?
the first Link value https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886 just does not work.
String html ="<script>function getcookie(Name){\n" +
" var search=Name+\"=\";\n" +
" if(document.cookie.length>0){\n" +
" offset=document.cookie.indexOf(search)\n" +
" if(offset!=-1){\n" +
" offset+=search.length\n" +
" end=document.cookie.indexOf(\";\",offset)\n" +
" if(end==-1){end=document.cookie.length}\n" +
" return unescape(document.cookie.substring(offset, en))\n" +
" }\n" +
" }\n" +
"}\n" +
" var player = new Playerjs({\n" +
" \"id\":\"player\",\n" +
" \"poster\":\"https://media.example.com/img/2147414277.jpg\",\n" +
" \"file\":\"[SD (480p)]https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886 or https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35,[HD (720р)]https://example2.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886 or https://exampl3.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886&ip=190.9.117.35\",\n" +
" \"default_quality\":\"SD (480p)\"\n" +
" });\n" +
" function PlayerjsEvents(event,id,data){\n" +
" if(event==\"start\"){\n" +
" var xhttp = new XMLHttpRequest();\n" +
" xhttp.open(\"GET\", \"stat.php?id=2147414277\", true);\n" +
" xhttp.send();\n" +
" }\n" +
" if(event==\"end\"){\n" +
" \n" +
" }\n" +
" }</script>";
Pattern p = Pattern.compile("file\"",Pattern.DOTALL);
String url = "";
for (Element element : script) {
Matcher m = p.matcher(element.data());
if (m.find()){
url = m.group(1);
}
}
System.out.println(url);
I don’t really understand how the Java Regex Pattern works. I tried to find this URL many times but I'm failed.
I would be grateful if someone will help with that or at least give me a link guide of java regex for a newbie. thx

It seems to me you are trying to extract URLs from JS code using java.
There are many regex playgrounds on the web you can try such as:
http://buildregex.com
https://regex101.com
and of course Google
Search.
For your specific case :
import java.util.*;
import java.util.regex.*;
import java.net.*;
public class HelloWorld{
public static void main(String []args){
System.out.println("Hello World");
String jsCode ="<script>function getcookie(Name){\n" +
" var search=Name+\"=\";\n" +
" if(document.cookie.length>0){\n" +
" offset=document.cookie.indexOf(search)\n" +
" if(offset!=-1){\n" +
" offset+=search.length\n" +
" end=document.cookie.indexOf(\";\",offset)\n" +
" if(end==-1){end=document.cookie.length}\n" +
" return unescape(document.cookie.substring(offset, en))\n" +
" }\n" +
" }\n" +
"}\n" +
" var player = new Playerjs({\n" +
" \"id\":\"player\",\n" +
" \"poster\":\"https://media.example.com/img/2147414277.jpg\",\n" +
" \"file\":\"[SD (480p)]https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886 or https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35,[HD (720р)]https://example2.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886 or https://exampl3.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886&ip=190.9.117.35\",\n" +
" \"default_quality\":\"SD (480p)\"\n" +
" });\n" +
" function PlayerjsEvents(event,id,data){\n" +
" if(event==\"start\"){\n" +
" var xhttp = new XMLHttpRequest();\n" +
" xhttp.open(\"GET\", \"stat.php?id=2147414277\", true);\n" +
" xhttp.send();\n" +
" }\n" +
" if(event==\"end\"){\n" +
" \n" +
" }\n" +
" }</script>";
List<String> urls = new ArrayList<String>();
String myUrlPattern = "((https?|file):((//)|(\\\\))+[\\w\\d:##%/;$()~_?\\+-=\\\\\\.&]*)";
Pattern p = Pattern.compile(myUrlPattern);
Matcher m = p.matcher(jsCode);
while (m.find()) {
urls.add(m.group());
}
for(String s: urls)
System.out.println(s);
}
}
Gives out:
https://media.example.com/img/2147414277.jpg
https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886
https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35,
https://example2.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886
https://exampl3.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886&ip=190.9.117.35
Hope this helps!

.txt array out from user input

I have since updated this code per suggestions for this forum. I am still confused as to how to get my .txt file selection to out print all instances of the name entered. my file in which all my .txt files are contained is named, namesbystate. To access this and all instances of the names entered are where I am getting issues. I am wondering if I replace myFile with namesbystate as a pathway extension or not?
package babynamestatesocial;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
public class BabyNameStateSocial {
private Scanner x;
public static void main(String[] args) throws FileNotFoundException {
// Scanner variable set up to intake user input for state selection and person's name
Scanner scan = new Scanner(System.in);
System.out.println("Available state files are: \n" +
"AK " + "AL " + "AR " + "AZ " + "CA " + "CO " + "\n" +
"CT " + "DC " + "DE " + "FL " + "GA " + "HI " + "\n" +
"IA " + "ID " + "IL " + "IN " + "KS " + "KY " + "\n" +
"LA " + "MA " + "MD " + "ME " + "MI " + "MN " + "\n" +
"MO " + "MS " + "MT " + "NC " + "ND " + "NE " + "\n" +
"NH " + "NJ " + "NM " + "NV " + "NY " + "OH " + "\n" +
"OK " + "OR " + "PA " + "RI " + "SC " + "SD " + "\n" +
"TN " + "TX " + "UT " + "VA " + "VT " + "WA " + "\n" +
"WI " + "WV " + "WY " + "\n");
System.out.print("Enter a state to read names from: " + "\n");
String filename = scan.nextLine() + ".txt";
System.out.println("Which name would you like to look up?");
String personName = scan.nextLine();
File myFile = new File(filename);
openFile(myFile,personName);
}
private static void openFile(File myFile, String personName){
try {
Scanner sc = new Scanner(myFile);
while (sc.hasNext()) {
// nextLine variable now has the line from the file in it that matches the name the person input
String nextLine = sc.nextLine();
if (nextLine.contains(personName)) {
}
}
} catch(FileNotFoundException e) {
System.out.print(e.getMessage());
}
}
}

Something like this will get you to where you want to be. I do not have the format of your state text files so I couldn't write the full program for you
(Edit - I just changed the code slightly. Instead of sc.next(), I should have written sc.nextLine(). The following program runs successfully with that edit):
package babynamestatesocial;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
public class BabyNameStateSocial {
private Scanner x;
public static void main(String[] args) throws FileNotFoundException {
Scanner scan = new Scanner(System.in);
System.out.println("Available state files are: \n" +
"AK " + "AL " + "AR " + "AZ " + "CA " + "CO " + "\n" +
"CT " + "DC " + "DE " + "FL " + "GA " + "HI " + "\n" +
"IA " + "ID " + "IL " + "IN " + "KS " + "KY " + "\n" +
"LA " + "MA " + "MD " + "ME " + "MI " + "MN " + "\n" +
"MO " + "MS " + "MT " + "NC " + "ND " + "NE " + "\n" +
"NH " + "NJ " + "NM " + "NV " + "NY " + "OH " + "\n" +
"OK " + "OR " + "PA " + "RI " + "SC " + "SD " + "\n" +
"TN " + "TX " + "UT " + "VA " + "VT " + "WA " + "\n" +
"WI " + "WV " + "WY " + "\n");
System.out.print("Enter a state to read names from: " + "\n");
String filename = scan.nextLine() + ".txt";
System.out.println("Which name would you like to look up?");
String personName = scan.nextLine();
File myFile = new File(filename);
openFile(myFile,personName);
}
private static void openFile(File myFile, String personName){
try {
Scanner sc = new Scanner(myFile);
while (sc.hasNext()) {
String nextLine = sc.nextLine();
if (nextLine.contains(personName)) {
//nextLine variable now has the line from the file in it that matches the name the person input so you need to parse that line and do something with it
}
}
} catch(Exception e) {
System.out.print(e.getMessage());
}
}
}

Neo4j error: java.lang.OutOfMemoryError: GC overhead limit exceeded

I use StatementResult = session.run(Cypher_query) to run cypher query with java. The program in concern is used to import nodes from csv files with LOAD CSV
This error is thrown:
Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.util.logging.SimpleFormatter.format(Unknown Source)
at java.util.logging.StreamHandler.publish(Unknown Source)
at java.util.logging.ConsoleHandler.publish(Unknown Source)
at java.util.logging.Logger.log(Unknown Source)
at java.util.logging.Logger.doLog(Unknown Source)
at java.util.logging.Logger.log(Unknown Source)
at org.neo4j.driver.internal.logging.JULogger.warn(JULogger.java:54)
at org.neo4j.driver.internal.security.TLSSocketChannel.close(TLSSocketChannel.java:477)
at org.neo4j.driver.internal.net.SocketClient.stop(SocketClient.java:192)
at org.neo4j.driver.internal.net.SocketConnection.close(SocketConnection.java:260)
at org.neo4j.driver.internal.net.ConcurrencyGuardingConnection.close(ConcurrencyGuardingConnection.java:178)
at org.neo4j.driver.internal.net.pooling.PooledSocketConnection.dispose(PooledSocketConnection.java:251)
at org.neo4j.driver.internal.net.pooling.PooledConnectionReleaseConsumer.accept(PooledConnectionReleaseConsumer.java:50)
at org.neo4j.driver.internal.net.pooling.PooledConnectionReleaseConsumer.accept(PooledConnectionReleaseConsumer.java:29)
at org.neo4j.driver.internal.net.pooling.PooledSocketConnection.close(PooledSocketConnection.java:200)
at org.neo4j.driver.internal.NetworkSession.closeCurrentConnection(NetworkSession.java:385)
at org.neo4j.driver.internal.NetworkSession.syncAndCloseCurrentConnection(NetworkSession.java:359)
at org.neo4j.driver.internal.NetworkSession.run(NetworkSession.java:102)
at org.neo4j.driver.internal.NetworkSession.run(NetworkSession.java:93)
at org.neo4j.driver.internal.NetworkSession.run(NetworkSession.java:73)
Is there any way to go around that error? Or is there no way except for importing less nodes?
The whole java code:
import java.io.File;
import java.io.FileNotFoundException;
import org.neo4j.driver.v1.AuthTokens;
import org.neo4j.driver.v1.Driver;
import org.neo4j.driver.v1.GraphDatabase;
import org.neo4j.driver.v1.Record;
import org.neo4j.driver.v1.Session;
import org.neo4j.driver.v1.StatementResult;
import java.util.List;
import java.util.Scanner;
import java.util.logging.Logger;
public class ImporterImprovedVersion {
private static String path = "file:///C:/csvsToImport/csvs";
private int num;
private boolean headerPresent(String filePath) throws FileNotFoundException{
Scanner scanner = new Scanner(new File(filePath));
if(scanner.hasNext()){
String firstLine = scanner.nextLine();
scanner.close();
if(filePath.contains("address")){
System.out.println("address! " + this.num + " " + firstLine.contains("addr_tag_links"));
return firstLine.contains("addr_tag_links");
}else if (filePath.contains("transaction")){
System.out.println("transaction! " + this.num + " " + firstLine.contains("value_bitcoin"));
return firstLine.contains("value_bitcoin");
}else{
System.out.println("wallet! " + this.num + " " + firstLine.contains("primAddress,firstSeenTime"));
return firstLine.contains("primAddress,firstSeenTime");
}
}
scanner.close();
return false;
}
public ImporterImprovedVersion(int num, boolean withOutputIndex, Session session, String mainDir) throws FileNotFoundException{
this.num = num;
//import csvs and create corresponding nodes
String folderPath = ImporterImprovedVersion.path + num + "/";
System.out.println(folderPath);
String queryAddr = null;
if(this.headerPresent(mainDir + num + "\\addresses.csv")){
queryAddr = "LOAD CSV From '" + folderPath + "addresses.csv' AS line"
+ " WITH line"
+ " SKIP 1";
}else{
queryAddr = "LOAD CSV From '" + folderPath + "addresses.csv' AS line";
}
String queryWallet = null;
if(this.headerPresent(mainDir + num + "\\wallet.csv")){
queryWallet = "LOAD CSV From '" + folderPath + "wallet.csv' AS line"
+ " WITH line"
+ " SKIP 1";
}else{
queryWallet = "LOAD CSV From '" + folderPath + "wallet.csv' AS line";
}
File tranFile = new File(mainDir + num + "\\transactionRelation.csv");
String queryTran = null;
System.out.println(tranFile);
System.out.println(tranFile.exists());
if(tranFile.exists()){
if(this.headerPresent(mainDir + num + "\\transactionRelation.csv")){
queryTran = "LOAD CSV From '" + folderPath + "transactionRelation.csv' AS line"
+ " WITH line"
+ " SKIP 1";
}else{
queryTran = "LOAD CSV From '" + folderPath + "transactionRelation.csv' AS line";
}
}else{
if(this.headerPresent(mainDir + num + "\\transactionRelation1.csv")){
queryTran = "LOAD CSV From '" + folderPath + "transactionRelation1.csv' AS line"
+ " WITH line"
+ " SKIP 1";
}else{
queryTran = "LOAD CSV From '" + folderPath + "transactionRelation1.csv' AS line";
}
}
StatementResult sR = session.run(queryWallet
+ " MERGE (w:Wallet { primWallAddr:line[0]})"
+ " ON CREATE SET w.first_seen = line[1], w.last_seen=line[2]");
System.out.println("Wallet nodes created");
sR = session.run(queryAddr + " MERGE (a:Address {AddId:(line[0])})"
+ " SET a.addr_tag_link= CASE WHEN a.addr_tag_link = 'null' or a.addr_tag_link IS NULL THEN line[1] ELSE a.addr_tag_link END,"
+ " a.addr_tag= CASE WHEN a.addr_tag = 'null' or a.addr_tag IS NULL THEN line[2] ELSE a.addr_tag END,"
+ " a.first_seen=line[3], a.last_seen=line[4], a.multiExist= a.multiExist OR apoc.convert.toBoolean(line[6])"
+ " WITH a, line[5] as li5"
+ " MATCH (a), (wa:Wallet) WHERE li5=wa.primWallAddr"
+ " MERGE (a)-[r:BelongTo{uniqueReferenceBelongTo:(a.AddId + wa.primWallAddr)}]->(wa)"
+ " ON CREATE SET r.primWallAddr = wa.primWallAddr,"
+ " wa.first_seen = CASE WHEN apoc.date.parse(wa.first_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") < apoc.date.parse(a.first_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") THEN wa.first_seen ELSE a.first_seen END,"
+ " wa.last_seen = CASE WHEN apoc.date.parse(wa.last_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") > apoc.date.parse(a.last_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") THEN wa.last_seen ELSE a.last_seen END");
System.out.println("Address nodes created");
System.out.println("BelongTo rel created");
if(withOutputIndex){
sR = session.run(queryTran
+ " MATCH (senderAddress:Address {AddId:line[0]}), (senderAddress)-[:BelongTo]->(sender:Wallet),"
+ " (receiverAddress:Address {AddId:line[1]}), (receiverAddress)-[:BelongTo]->(receiver:Wallet)"
+ " MERGE (sender)-[r:SendTo{uniqueReferenceTran:(line[2] + line[8])}]->(receiver)"
+ " ON CREATE SET r.tranHashString=line[2],r.time=line[3],r.value_bitcoin=line[4],"
+ "r.value_dollar=line[5],r.type=line[6],r.estChanAddr=line[7],r.outputIndex=line[8]");
}else{
System.out.println("withoutOutputIndex");
sR = session.run(queryTran
+ " MATCH (senderAddress:Address {AddId:line[0]}), (senderAddress)-[:BelongTo]->(sender:Wallet),"
+ " (receiverAddress:Address {AddId:line[1]}), (receiverAddress)-[:BelongTo]->(receiver:Wallet)"
+ " MERGE (sender)-[r:SendTo{uniqueReferenceTran:(line[2] + 'default')}]->(receiver)"
+ " ON CREATE SET r.tranHashString=line[2],r.time=line[3],r.value_bitcoin=line[4],"
+ " r.value_dollar=line[5],r.type=line[6],r.estChanAddr=line[7],r.outputIndex='default'");
}
sR.list();
System.out.println("Tran rel created");
String queryAddrDiffWallet = "MATCH (a:Address)-[:BelongTo]->(w1:Wallet), (a)-[r0:BelongTo]->(w2:Wallet)"
+ " WHERE w1 <> w2"
+ " RETURN count(a)";
sR = session.run(queryAddrDiffWallet);
List<Record> records = sR.list();
System.out.println(records.get(0).get("count(a)").asInt());
System.out.println(records.get(0).get("count(a)").asInt() == 0);
if(records.get(0).get("count(a)").asInt() != 0){
sR = session.run("MATCH (a:Address)-[:BelongTo]->(w1:Wallet), (a)-[r0:BelongTo]->(w2:Wallet)"
+ " WHERE w1 <> w2"
+ " RETURN a");
}
String queryMergeWallet = "MATCH (a:Address)-[:BelongTo]->(w1:Wallet)"
+ " WITH DISTINCT a, min(ID(w1)) as minId"
+ " MATCH (minW:Wallet)"
+ " WHERE ID(minW) = minId"
+ " SET a.primWallAddr = minW.primWallAddr"
+ " WITH DISTINCT minW, a"
+ " MATCH (a)-[r0:BelongTo]->(w2:Wallet)"
+ " WHERE minW <> w2"
+ " WITH DISTINCT minW, w2, r0"
+ " SET minW.first_seen = CASE WHEN apoc.date.parse(minW.first_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") < apoc.date.parse(w2.first_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") THEN minW.first_seen ELSE w2.first_seen END,"
+ " minW.last_seen = CASE WHEN apoc.date.parse(minW.last_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") > apoc.date.parse(w2.last_seen, 's',\"yyyy-MM-dd'T'HH:mm:ss\") THEN minW.last_seen ELSE w2.last_seen END"
+ " WITH DISTINCT minW, w2, r0"
+ " DELETE r0"
+ " WITH DISTINCT minW, w2"
+ " MATCH (b:Address)-[r:BelongTo]->(w2)"
+ " WITH DISTINCT r, minW, w2, b"
+ " DELETE r"
+ " WITH DISTINCT b, minW, w2"
+ " MERGE (b)-[be:BelongTo{uniqueReferenceBelongTo:(b.AddId + minW.primWallAddr)}]->(minW)"
+ " ON CREATE SET be.primWallAddr = minW.primWallAddr"
+ " WITH DISTINCT w2, minW"
+ " MATCH (w3:Wallet)-[r2:SendTo]->(w2)"
+ " MERGE (w3)-[rN:SendTo{uniqueReferenceTran:r2.uniqueReferenceTran}]->(minW)"
+ " ON CREATE SET rN.tranHashString=r2.tranHashString,rN.time=r2.time,"
+ "rN.value_bitcoin=r2.value_bitcoin,rN.value_dollar=r2.value_dollar,"
+ "rN.type=r2.type,rN.estChanAddr=r2.estChanAddr,rN.outputIndex=r2.outputIndex"
+ " WITH DISTINCT w2, minW, r2"
+ " DELETE r2"
+ " WITH DISTINCT w2, minW"
+ " MATCH (w2)-[r1:SendTo]->(w4:Wallet)"
+ " MERGE (minW)-[rN2:SendTo{uniqueReferenceTran:r1.uniqueReferenceTran}]->(w4)"
+ " ON CREATE SET rN2.tranHashString=r1.tranHashString,rN2.time=r1.time,"
+ "rN2.value_bitcoin=r1.value_bitcoin,rN2.value_dollar=r1.value_dollar,"
+ "rN2.type=r1.type,rN2.estChanAddr=r1.estChanAddr,rN2.outputIndex=r1.outputIndex"
+ " WITH DISTINCT r1"
+ " DELETE r1"
;
if(records.get(0).get("count(a)").asInt() != 0){
//merge any wallet containing same addresses and adjust the transaction as well (w2 merge to w1)
try{
sR = session.run(queryMergeWallet);
}catch(Exception e){
e.printStackTrace();
try {
Thread.sleep(20000);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
sR = session.run(queryMergeWallet);
}
}
System.out.println("same wallet merged");
System.out.println("----------abc----------------------" + num);
//delete all wallets with no addresses
sR = session.run(
" MATCH (n:Wallet)"
+ " WHERE NOT ()-[:BelongTo]->(n)"
+ " DETACH DELETE n"
);
System.out.println("Wall with no addr deleted");
}
public static void main(String[] args) throws FileNotFoundException{
Driver driver = GraphDatabase.driver( "bolt://localhost:7687", AuthTokens.basic( "neo4j", "neo7474" ) );
try(Session session = driver.session()){
String mainDir = "C:\\Program Files\\neo4j-enterprise-3.1.1\\import\\csvsToImport\\csvs";
// create index
session.run( "CREATE CONSTRAINT ON (addr:Address) ASSERT addr.AddId IS UNIQUE");
session.run( "CREATE CONSTRAINT ON (wa:Wallet) ASSERT wa.primWallAddr IS UNIQUE");
System.out.println("aaa");
int counter = 537;
while(counter < 660){
File dir = new File(mainDir + counter);
if(dir.exists()){
System.out.println("aaa");
ImporterImprovedVersion a = new ImporterImprovedVersion(counter, counter > 260, session, mainDir);
}
counter ++;
}
}
}
}
I imported many rows for nodes and relationships. By the time the exception is thrown, the graph has 184448 relationships, 82179 of them have 8 properties; and 117314 nodes, 69714 of them have 6 properties. I will update my question with this information. (Could the number of nodes and relationships along with their properties be the reason?)

Did you try to increase the heap size in the JVM (-Xmx option)? The CSVs you are trying to import may be too big.

LOAD CSV has built in batching possibilities. So whenever you are running out of memory using LOAD CSV use PERIODIC COMMIT. Read more in documentation.
Example:
USING PERIODIC COMMIT 10000
LOAD CSV WITH HEADERS FROM "file:///customers.csv" AS row
CREATE (:Customer {companyName: row.CompanyName})

Storing part of method as another method?

Basically, I have code that uses the same few lines in different scenarios, and it makes the code a bit messy (especially since I probably overcomplicated what I made, but that's another issue). What I wanted to do is store that piece of code as another function and calling it in the longer one. WHich should work as far as I know, except, the longer function has variables that aren't set in the shorter one, and if they were, I'm pretty sure it would change the final result of the function.
Here is the longer code:
public static void combat(Character a,Character b){
int battleturn = 1;
int maxTurns=20;
int draw1 = 0;
//stop after 20 turns, or stop when one player has 0 HP.
while (a.health > 0 && b.health > 0 && maxTurns > 0){
/* run a round of combat*/
if (b.health < 0.25 * b.maxHealth){
if (b.getFlee(a)){
System.out.println(">>>>>>>>>>The enemy has fled successfully<<<<<<<<<<");
break;
}else{
System.out.println("Battle turn " + battleturn + ", <attack> or <flee>?");
Scanner input = new
Scanner(System.in);
String move = input.next();
while(!move.equals("attack") && !move.equals("flee")){
System.out.println("Error: Please input <attack> or <flee>.");
input = new Scanner(System.in);
move = input.next();
}
if (move.equals("attack")){
System.out.println(a.name + " dealt " + a.combatRound(b) + " damage to " + b.name + "." + " Enemy has "
+ b.getHealth() + "/" + b.getMaxHealth() + " health.");
System.out.println(b.name + " dealt " + b.combatRound(a) + " damage to " + a.name + "." + " You have " +
a.getHealth() + "/" + a.getMaxHealth() + " health");
maxTurns--;
battleturn++;
}else if(move.equals("flee")){
if (a.getFlee(b)){
draw1++;
System.out.println(">>>>>>>>>>You have fled!<<<<<<<<<<");
break;
}else{
System.out.println(a.name + " dealt " + a.combatRound(b) + " damage to " + b.name + "." + " Enemy has " +
b.getHealth() + "/" + b.getMaxHealth() + " health.");
System.out.println(b.name + " dealt " + b.combatRound(a) + " damage to " + a.name + "." + " You have " +
a.getHealth() + "/" + a.getMaxHealth() + " health");
maxTurns--;
battleturn++;
}
}
}
}else{
System.out.println("Battle turn " + battleturn + ", <attack> or <flee>?");
Scanner input = new
Scanner(System.in);
String move = input.next();
while(!move.equals("attack") && !move.equals("flee")){
System.out.println("Error: Please input <attack> or <flee>.");
input = new Scanner(System.in);
move = input.next();
}
if (move.equals("attack")){
System.out.println(a.name + " dealt " + a.combatRound(b) + " damage to " + b.name+ "." + " Enemy has " +
b.getHealth() + "/" + b.getMaxHealth() + "health.");
System.out.println(b.name + " dealt " + b.combatRound(a) + " damage to " + a.name + "." + " You have " +
a.getHealth() + "/" + a.getMaxHealth() + " health");
maxTurns--;
battleturn++;
}else if(move.equals("flee")){
if (a.getFlee(b)){
draw1++;
System.out.println(">>>>>>>>>>You have fled!<<<<<<<<<<");
break;
}else{
System.out.println(a.name + " dealt " + a.combatRound(b) + " damage to " + b.name+ "." + " Enemy has " +
b.getHealth() + "/" + b.getMaxHealth() + " health.");
System.out.println(b.name + " dealt " + b.combatRound(a) + " damage to " + a.name + "." + " You have " +
a.getHealth() + "/" + a.getMaxHealth() + " health");
maxTurns--;
battleturn++;
}
}
}
}
}
As you can see there is a part of code that is repeated, and that is.
System.out.println("Battle turn " + battleturn + ", <attack> or <flee>?");
Scanner input = new
Scanner(System.in);
String move = input.next();
while(!move.equals("attack") && !move.equals("flee")){
System.out.println("Error: Please input <attack> or <flee>.");
input = new Scanner(System.in);
move = input.next();
}
if (move.equals("attack")){
System.out.println(a.name + " dealt " + a.combatRound(b) + " damage to " + b.name + "." + " Enemy has "
+ b.getHealth() + "/" + b.getMaxHealth() + " health.");
System.out.println(b.name + " dealt " + b.combatRound(a) + " damage to " + a.name + "." + " You have " +
a.getHealth() + "/" + a.getMaxHealth() + " health");
maxTurns--;
battleturn++;
}else if(move.equals("flee")){
if (a.getFlee(b)){
draw1++;
System.out.println(">>>>>>>>>>You have fled!<<<<<<<<<<");
break;
}else{
System.out.println(a.name + " dealt " + a.combatRound(b) + " damage to " + b.name + "." + " Enemy has " +
b.getHealth() + "/" + b.getMaxHealth() + " health.");
System.out.println(b.name + " dealt " + b.combatRound(a) + " damage to " + a.name + "." + " You have " +
a.getHealth() + "/" + a.getMaxHealth() + " health");
maxTurns--;
battleturn++;
}
}
}
It won't compile if I set that chunk of code as a method, because it doesn't have the variables battleturn, maxturns, draw1, but if I put them in there, the amount of battle turns messes up.
Any ideas?

Java applications should be modular: each class fulfilling its own function, each method generally performing a single operation.
In a method you can use either class variables or its own local variables.
If you need several methods work with the same data, it should either be part of a class (instance and/or static variables) or passed to each method as parameters.
Make sure that you do not define class variables in a method. This will create local variables that will shadow class variables.

This might help you accomplish what you're trying to do.
private static void reportDamage(Character a,
Character b) {
System.out.println(a.name + " dealt "
+ a.combatRound(b) + " damage to " + b.name
+ "." + " Enemy has " + b.getHealth() + "/"
+ b.getMaxHealth() + " health.");
}
I suggest changing your combat method like this.
int battleturn = 0;
int maxTurns = 20;
// stop after 20 turns, or stop when one player has 0
// HP.
Scanner input = new Scanner(System.in);
try {
while (a.health > 0 && b.health > 0
&& battleturn < maxturn) {
battleturn++;
/* run a round of combat */
if (b.getFlee(a)) {
System.out.println(">>>>>>>>>>"
+ "The enemy has fled successfully"
+ "<<<<<<<<<<");
break;
} else {
System.out.println("Battle turn "
+ battleturn + ", <attack> or <flee>?");
boolean isFlee = false;
boolean isAttack = false;
String move = input.next();
for (;;) {
isAttack = "attack".equalsIgnoreCase(move);
isFlee = "flee".equalsIgnoreCase(move);
if (isFlee || isAttack) {
break;
}
System.out.println("Error: "
+ "Please input <attack> or <flee>.");
move = input.next();
}
if (isAttack) {
reportDamage(a, b);
reportDamage(b, a);
} else { // isFlee
if (a.getFlee(b)) {
System.out.println(">>>>>>>>>>"
+ "You have fled successfully"
+ "<<<<<<<<<<");
break;
} else {
// b is fleeing.
// reportDamage(a, b);
reportDamage(b, a);
}
}
}
}
} finally {
input.close();
}

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Java is a programming language and computing platform first released by Sun Microsystems in 1995.

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Storing part of method as another method?

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