This question already has answers here:
How do I convert a String to an int in Java?
(47 answers)
Closed 6 years ago.
How can I convert a String to an int in Java?
My String contains only numbers and I want to return the number it represents.
For example, given the string "1234" the result should be the number 1234
String Availability = json.getString("Availability");before parsing value ="4"
int x = Integer.parseInt(Availability);here after parsing it gives me 2 i don't know why
You can use the foll function Integer.valueOf here is an example
public static void main(String args[]){
int num = Integer.valueOf("22");
num+=2;
System.out.println(num); // output 24
}
Related
This question already has answers here:
Accessing the value of a variable by its name as string in Java
(2 answers)
Different between parseInt() and valueOf() in java?
(11 answers)
Closed last month.
In Java, let's say I have...
let hello = 10;
Is it possible to retrieve hello's value (10) using the string reference 'hello'?
Something like valueOf(....'hello'....) = 10
This is how you can retrive in Java. Also let is used in JavaScript not in Java.
public class Test {
public static void main(String[] args) {
String hello = "10";
int helloNum = Integer.valueOf(hello); //converting String "10" into int 10
int num = 10;
String numString = String.valueOf(num);//converting int 10 to string "10"
}
}
This question already has answers here:
Converting double to string
(17 answers)
Closed 1 year ago.
so I got a Problem coding in Java.
I have some doubles declared and I need to calculate with them. But I dont know who I convert the doubles to a result that can be posted in a JLabel as a String. It always says something like: cannot convert double to String. I have tried toString method but I am either doing it wrong or it just doesnt work. Any ideas for a working code?
You can use String#valueOf.
Demo:
public class Main {
public static void main(String[] args) {
double val = 12.34;
String strVal = String.valueOf(val);
System.out.println(strVal);
}
}
Output:
12.34
This question already has answers here:
How do I convert a String to an int in Java?
(47 answers)
Closed 2 years ago.
I have tried to convert my String to an int but my code keeps crashing.
The code is as follows:
String age = getAge();
CalculateDaysSinceBirth((int) age);
But I get a NumberFormatException.
Try using Integer.valueOf(age) insted of (int) age
This question already has answers here:
Java: parse int value from a char
(9 answers)
Closed 6 years ago.
If I have a string like String myString = "12345" and I want to return the value at index [0]. How do I do this? I've tried for example int foo = myString.charAt(0) and get a weird value like 49?
Use Character.getNumericValue():
String myString = "12345";
int foo = Character.getNumericValue(myString.charAt(0));
This question already has answers here:
How do I convert a String to an int in Java?
(47 answers)
Java - Convert integer to string [duplicate]
(6 answers)
Closed 8 years ago.
I have knowledge of wrapper class methods, but I want to know how to convert the component of String[] or Object[] to other type like int,float or Date format. for example
BufferedReader br = new BufferedReader(new FileReader(csvfile));
String curr;
while((scurr=br.readLine())!null) {
String[] input = scurr.split(",");
}
Now I want assign the component of String to primitive type(assume that my input string contains integer value)
but when I am trying to do
int i = input[0]
I am getting following suggestions:
1. change the type of i to String or
2. change the type of input to int
Is there any way to tackle the above scenario
edit:
I am really sorry guys, I really don't want ask duplicate questions, but after going through your answers and analyzing my scenario, I understood my mistake. So I would like to delete this post. How to do that without impacting the community please guild me
You can use Integer.parseInt() without an issue.
int i = input[0] // i is an int while input[0] is a String
Now
int i=Integer.parseInt(input[0])
will convert String to int
Integer.parseInt()