How To Convert An Integer To String In Java

In this article you are going to learn how can you convert an integer to a String.

There are multiple ways we can convert an int to string in java. let’s check what are they.

1. String.ValueOf() method
2. Integer.toString() method
3. String.format() method

1. String.valueOf() method

String.valueOf() method returns the string representation of the Object argument.

So when we pass an int as parameter to valueOf() method, it returns it’s String representation.

If the argument is null, then a string equal to "null"will be returned.

Internally valueOf() method calls toString() method on the object argument to get its string representation.

An example to convert an int to string using valueOf() method is given below.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
/*
 * A program to convert an int to string in java using 
 *  the String.toSTring() method.
 *
 * @author Gaurav Kukade at coderolls.com
 */

public class IntToSTring{

     public static void main(String []args){
        
        int number = 1234;
        
        String numberString = String.valueOf(number);
        
        //print string value of number
        System.out.println("numberString: " + numberString);
    }
}

Output

1
numberString: 1234

2. Integer.toString() method

Integer.toString() method returns the String object of the Integer’s value.

The value is converted to signed decimal representation and returned as a string, exactly as if the integer value were given as an argument to the toString() method.

An example to convert an int to string using the toString() method is given below.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
/*
 * A program to convert an int to string in java using 
 *  the Integer.toString() method.
 *
 * @author Gaurav Kukade at coderolls.com
 */

public class IntToSTring{

     public static void main(String []args){
        
        int number = 1234;
        
        //String numberString = String.valueOf(number);
        
        
        String numberString = Integer.toString(number);
        //print string value of number
        System.out.println("numberString: " + numberString);
    }
}

Output

1
numberString: 1234

Conclusion

We can convert an int to String in Java using

1. the String.valueOf() method

1
String numberString = String.valueOf(number);

1. the Integer.toString() method.

1
String numberString = Integer.toString(number);

In both cases, number is an int value.

Please write down your thoughts in the comment section below.