I'm making a random creature generator, its going all nice and dandy, however when it comes to printing the results, it prints the same result 5 times. I tried some different things like using println() multiple times and do while loops, however every time I run the file I just get a bunch of the same results. "a b c d e" are strings that generate the creature
int x = 1;
do {
System.out.println(x +" " +a +" " +b +" " +c +" " +d +" " +e);
x++;
} while (x<=5);
The reason why you're getting the same answer 5 times is because your do-while loop runs 5 times without changing the 'creatures' .
System.out.println(a +" "+ b + " " + c + " " + d + " " +e);
If you remove the do-while loop you'll get the same answer only once however just in case i misunderstood your question i made a small demo of a simple way in which to get multiple random results with a for-loop,a String-array and the Random class
String[] creatures = {"Dog", "Cat", "Fish", "Monkey", "Horse"};
Random r = new Random();
for (int i = 0; i < 5; i++) {
String creature1 = creatures[r.nextInt(creatures.length)];
String creature2 = creatures[r.nextInt(creatures.length)];
String creature3 = creatures[r.nextInt(creatures.length)];
String creature4 = creatures[r.nextInt(creatures.length)];
String creature5 = creatures[r.nextInt(creatures.length)];
System.out.println(creature1 + " " + creature2 + " " + creature3
+ " " + creature4 + " " + creature5);
}
Related
I want to display the sum of two numbers beside the equal sign.
Scanner scan = new Scanner(System.in);
int i ;
System.out.println("enter a number: " );
i = scan.nextInt();
int a = i - 1 ;
while(a >= 1){
System.out.println(i +" + "+ a + " = " );
//i want to display the sum of two numbers beside the equal sign.
i =i + a ;
System.out.println(i);
a --;
// how can I display the answer beside the equal sign?
}
}
}
How can I display the answer beside the equal sign?
Change your first println to print.
As per your question I think you are most probably asking how we can show the sum of two numbers in the print statement.
So in your code after "=" you just need to add (i+a) this will sum the value of i and a.
System.out.println(i +" + "+ a + " = " + (i+a)).
I hope this answers your question.
System.out.println() method prints a "newline character" (\n) right after its' input.
There is another method that does not do this:
System.out.print()
You should change
System.out.println(i +" + "+ a + " = " ); to
System.out.print(i +" + "+ a + " = " ); this.
This question already has answers here:
What's the simplest way to print a Java array?
(37 answers)
Closed 4 years ago.
It's a program that is a sports league, a group of teams plays through a Schedule of Games and determine the winner.
The program runs fine to the point where the final output won't let me see the winner, it shows this instead:
The season winner(s) with 9 points: [Ljava.lang.String;#e73f9ac
I changed it to teams.length which made the program work but it would show me the teams (i) number instead of the string name like "Vancouver".
Thanks in advance.
}
int peak = 0;
int[] total = new int[teams.length];
for (int i=0; i<teams.length; i++){
total[i] = 2*wins[i]+ties[i];
if (total[i] > peak) peak = total[i];
System.out.println(teams[i]+" - " + wins[i] + " wins, " + losses[i] + " losses, " + ties[i] + " ties = " + total[i]);
}
System.out.println("The season winner(s) with " + peak + " points: " + teams);
for (int i=0; i<teams.length; i++){
if (peak < total[i]) peak = total[i];
}
}
static int indexOfTeam(String team, String[] teams){
for (int i=0; i<teams.length; i++)
if (team.compareTo(teams[i]) == 0) return i;
return -1;
}
}
Instead of printing the winning team you're printing the teams array.
While iterating store besides the peak, the index of the winning team:
int index = -1;
for (int i=0; i<teams.length; i++){
total[i] = 2*wins[i]+ties[i];
if (total[i] > peak) {
index = i;
peak = total[i];
}
System.out.println(teams[i]+" - " + wins[i] + " wins, " + losses[i] + "
losses, " + ties[i] + " ties = " + total[i]);
}
and finally:
System.out.println("The season winner(s) with " + peak + " points: " +
teams[index]);
teams is an array of Strings, you must insert the index after the name
If you want to print all teams use Arrays.toString(teams), but I think that you would like to print only part of teams array, so you can create list of winners
List<String> winners = new ArrayList<Integer>;
for (int i=0; i<teams.length; i++){
total[i] = 2*wins[i]+ties[i];
if (total[i] > peak) {
winners.add(teams[i]);
peak = total[i];
}
System.out.println(teams[i]+" - " + wins[i] + " wins, " + losses[i] + "
losses, " + ties[i] + " ties = " + total[i]);
}
indexes object you can simply print
System.out.println("The season winner(s) with " + peak + " points: " +winners);
If you want to have an array you can use toArray() on winners object.
I have a working code but my output doesn't count up.
Here is the code I am working with:
for(Course course : courses) {
for(int i=0;i<1;i++) {
System.out.println("[" + (i+1) + "]" + course.getCode() + "(" + course.getCreditHour() + ")");
}
}
System.out.print("Enter your choice : ");
I need the (i+1) to count from one to 7.
Here is a copy of the output I currently get:
Please type the number inside the [] to register for a course
The number inside the () is the credit hours for the course
[1]IT1006(6)
[1]IT4782(3)
[1]IT4789(3)
[1]IT4079(6)
[1]IT2230(3)
[1]IT3345(3)
[1]IT2249(6)
Enter your choice :
I need the numbers inside the square brackets to count from 1 to 7.
This is for an academic assignment.
Your inner loop isn't doing anything. There's no point in using a loop if you've hard coded it to just run once.
I'd get rid of your outer loop and just index courses directly:
for(int i = 0; i < courses.size(); i++){
Course course = courses.get(i);
System.out.println("[" + (i+1) + "]" + course.getCode() + "(" + course.getCreditHour() + ")");
}
for(Course course : courses) means : for each course so i is reinitialised you whant a variable that will be increment on each iteration so the variable must be declared outside the block. you can write some thing like this :
int i = 1;
for(Course course : courses) {
System.out.println("[" + (i++) + "]" + course.getCode() + "(" + course.getCreditHour() + ")");
}
System.out.print("Enter your choice : ");
the method of #Carcigenicate will work too but can handle so performance issue if you use linked structure as linkedlist tthis will become for an Array :
for (int i = 0 ; i < courses.lenght ; i++){
System.out.println("[" + i + "]" + courses[i].getCode() + "(" + courses[i].getCreditHour() + ")");
}
System.out.print("Enter your choice : ");
and on collections :
for (int i = 0 ; i < courses.getSize(); i++){
System.out.println("[" + i + "]" + courses.get(i).getCode() + "(" + courses.get(i).getCreditHour() + ")");
}
System.out.print("Enter your choice : ");
I know that it is a horrible question to ask at this forum since I do know the rules but at the moment I just do not know what the issue is here. So for anyone that has some spare time I would be very thankful if it could be answered. I tried to carry out the Euler Project exercise number 13: Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.
I know the logic that I have used behind it is not the best and later I managed to solve the problem using another method, but it still bothers me until today why does the following code not work:
import java.util.ArrayList;
public class LargeSum {
public static ArrayList<String> addAll(ArrayList<ArrayList<Integer>> listOfResults) {
ArrayList<String> result = new ArrayList<String>();
int singlesum = 0;
int remainder = 0;
for (int i = 49; i >= 0; i--) {
System.out.println(remainder + "to rem");
singlesum += remainder;
for (ArrayList<Integer> list : listOfResults) {
System.out.println(list.get(i));
singlesum += list.get(i);
}
String lastChar = String.valueOf(singlesum);
singlesum = 0;
result.add(String.valueOf(lastChar.charAt(lastChar.length() - 1)));
remainder = 0;
if (lastChar.length() > 1) {
remainder = Integer.parseInt(lastChar.substring(0, lastChar.length() - 1));
}
}
if (remainder > 0)
result.add(String.valueOf(remainder));
return result;
}
public static ArrayList<ArrayList<Integer>> createLists() {
ArrayList<ArrayList<Integer>> results = new ArrayList<ArrayList<Integer>>();
String c =
"37107287533902102798797998220837590246510135740250"
+ "46376937677490009712648124896970078050417018260538"
+ "74324986199524741059474233309513058123726617309629"
+ "91942213363574161572522430563301811072406154908250"
+ "23067588207539346171171980310421047513778063246676"
+ "89261670696623633820136378418383684178734361726757"
+ "28112879812849979408065481931592621691275889832738"
+ "44274228917432520321923589422876796487670272189318"
+ "47451445736001306439091167216856844588711603153276"
+ "70386486105843025439939619828917593665686757934951"
+ "62176457141856560629502157223196586755079324193331"
+ "64906352462741904929101432445813822663347944758178"
+ "92575867718337217661963751590579239728245598838407"
+ "58203565325359399008402633568948830189458628227828"
+ "80181199384826282014278194139940567587151170094390"
+ "35398664372827112653829987240784473053190104293586"
+ "86515506006295864861532075273371959191420517255829"
+ "71693888707715466499115593487603532921714970056938"
+ "54370070576826684624621495650076471787294438377604"
+ "53282654108756828443191190634694037855217779295145"
+ "36123272525000296071075082563815656710885258350721"
+ "45876576172410976447339110607218265236877223636045"
+ "17423706905851860660448207621209813287860733969412"
+ "81142660418086830619328460811191061556940512689692"
+ "51934325451728388641918047049293215058642563049483"
+ "62467221648435076201727918039944693004732956340691"
+ "15732444386908125794514089057706229429197107928209"
+ "55037687525678773091862540744969844508330393682126"
+ "18336384825330154686196124348767681297534375946515"
+ "80386287592878490201521685554828717201219257766954"
+ "78182833757993103614740356856449095527097864797581"
+ "16726320100436897842553539920931837441497806860984"
+ "48403098129077791799088218795327364475675590848030"
+ "87086987551392711854517078544161852424320693150332"
+ "59959406895756536782107074926966537676326235447210"
+ "69793950679652694742597709739166693763042633987085"
+ "41052684708299085211399427365734116182760315001271"
+ "65378607361501080857009149939512557028198746004375"
+ "35829035317434717326932123578154982629742552737307"
+ "94953759765105305946966067683156574377167401875275"
+ "88902802571733229619176668713819931811048770190271"
+ "25267680276078003013678680992525463401061632866526"
+ "36270218540497705585629946580636237993140746255962"
+ "24074486908231174977792365466257246923322810917141"
+ "91430288197103288597806669760892938638285025333403"
+ "34413065578016127815921815005561868836468420090470"
+ "23053081172816430487623791969842487255036638784583"
+ "11487696932154902810424020138335124462181441773470"
+ "63783299490636259666498587618221225225512486764533"
+ "67720186971698544312419572409913959008952310058822"
+ "95548255300263520781532296796249481641953868218774"
+ "76085327132285723110424803456124867697064507995236"
+ "37774242535411291684276865538926205024910326572967"
+ "23701913275725675285653248258265463092207058596522"
+ "29798860272258331913126375147341994889534765745501"
+ "18495701454879288984856827726077713721403798879715"
+ "38298203783031473527721580348144513491373226651381"
+ "34829543829199918180278916522431027392251122869539"
+ "40957953066405232632538044100059654939159879593635"
+ "29746152185502371307642255121183693803580388584903"
+ "41698116222072977186158236678424689157993532961922"
+ "62467957194401269043877107275048102390895523597457"
+ "23189706772547915061505504953922979530901129967519"
+ "86188088225875314529584099251203829009407770775672"
+ "11306739708304724483816533873502340845647058077308"
+ "82959174767140363198008187129011875491310547126581"
+ "97623331044818386269515456334926366572897563400500"
+ "42846280183517070527831839425882145521227251250327"
+ "55121603546981200581762165212827652751691296897789"
+ "32238195734329339946437501907836945765883352399886"
+ "75506164965184775180738168837861091527357929701337"
+ "62177842752192623401942399639168044983993173312731"
+ "32924185707147349566916674687634660915035914677504"
+ "99518671430235219628894890102423325116913619626622"
+ "73267460800591547471830798392868535206946944540724"
+ "76841822524674417161514036427982273348055556214818"
+ "97142617910342598647204516893989422179826088076852"
+ "87783646182799346313767754307809363333018982642090"
+ "10848802521674670883215120185883543223812876952786"
+ "71329612474782464538636993009049310363619763878039"
+ "62184073572399794223406235393808339651327408011116"
+ "66627891981488087797941876876144230030984490851411"
+ "60661826293682836764744779239180335110989069790714"
+ "85786944089552990653640447425576083659976645795096"
+ "66024396409905389607120198219976047599490197230297"
+ "64913982680032973156037120041377903785566085089252"
+ "16730939319872750275468906903707539413042652315011"
+ "94809377245048795150954100921645863754710598436791"
+ "78639167021187492431995700641917969777599028300699"
+ "15368713711936614952811305876380278410754449733078"
+ "40789923115535562561142322423255033685442488917353"
+ "44889911501440648020369068063960672322193204149535"
+ "41503128880339536053299340368006977710650566631954"
+ "81234880673210146739058568557934581403627822703280"
+ "82616570773948327592232845941706525094512325230608"
+ "22918802058777319719839450180888072429661980811197"
+ "77158542502016545090413245809786882778948721859617"
+ "72107838435069186155435662884062257473692284509516"
+ "20849603980134001723930671666823555245252804609722";
for (int i = 0; i < 4950; i += 50) {
ArrayList<Integer> strings = new ArrayList<Integer>();
for (int j = i; j <= i + 49; j++) {
strings.add(Integer.parseInt(String.valueOf(c.charAt(j))));
}
results.add(strings);
}
return results;
}
public static void main(String[] args) {
ArrayList<ArrayList<Integer>> results = createLists();
System.out.println(addAll(results));
}
}
The array should give me the number from the back one by one each digit of the number yet I do not get the answer to the question. I investigated this many times for smaller numbers (where it worked) and for only two numbers (and it worked) yet I cannot get the answer to the question (I always get another number as result not the designated Result: 5537376230).
Thanks to everybody that looks at the code.
Best regards,
Rob
I believe the main source of the issue lies in the fact that you hardcoded a lot of numerical values and thus can not really verify correctness in the middle steps. Especially bad idea is using single String instead of the array of String[] for your source data.
Anyway, if you re-check the task you may find that the last numbers are:
...
72107838435069186155435662884062257473692284509516
20849603980134001723930671666823555245252804609722
53503534226472524250874054075591789781264330331690
while in your code you have:
+ "72107838435069186155435662884062257473692284509516"
+ "20849603980134001723930671666823555245252804609722";
So you just missed the last number and that spoils the result.
Sidenotes:
you don't really handle the top digits (your "top" digit is "55") properly which is a result of a lot of hardcoding but you probably already know that.
In java there is a BigInteger class that can solves this task easily. It is OK to write your own code for learning but for the real world task you should use a standard library unless you have a good reason not to use it.
In the case where you have a remainder left over, you add it to result as a string. But the digits in your results are reversed, so you also need to reverse the digits of the remainder.
It also looks like you've got an off-by-one error in the construction of your numbers. i < 4950 should be i < 5000 I think, since the 100th number starts at index 99 * 50 = 4950.
hi i made a program that counts the elements in an array and i done it already. Now i want to display the result in a textView.. I want to display it this way...
1 appeared 2times
2 appeared 1times
3 appeared 1times
6 appeared 1times
this is my code..
The last element only displays in the textView..
please help me..Thanks
String []values = ( input.getText().toString().split(","));
Arrays.sort(values);
int c=1,i=0,range=4;
while(i<values.length-1){
while(values[i]==values[i+1]){
c++;
i++;
}
jLabel7.setText(values[i] + " appeared " + c + " times");
c=1;
i++;
if(i==values.length-1)
jLabel7.setText(values[i] + " appeared " + c + " times");
}
Try this:
jLabel7.setText(jLabel7.getText() + "\n" + values[i] + " appeared " + c + " times");
Att:
If u are using swing componentes, is not a TextView but JLabel, or u are working for Android?
update your code to:
String []values = ( input.getText().toString().split(","));
Arrays.sort(values);
int c=1,i=0,range=4;
while(i<values.length-1){
while(values[i]==values[i+1]){
c++;
i++;
}
jLabel7.setText(jLabel7.getText() + "\n" + values[i] + " appeared " + c + " times");
c=1;
i++;
if(i==values.length-1)
jLabel7.setText(jLabel7.getText() + "\n" + values[i] + " appeared " + c + " times");
}
append all the values into a single String object and then use the setText method to display the string