Convert int to String in Java

In this Java core tutorial, we learn how to convert int value into String value in Java via different solutions.

Using String.valueOf() method to instantiate String from a int value

ConvertIntToStringExample1.java

public class ConvertIntToStringExample1 {
    public static void main(String[] args) {
        int value1 = 987;
        String value2 = String.valueOf(value1);

        System.out.println("int value: " + value1);
        System.out.println("String value: " + value2);
    }
}

The output is:

int value: 987
String value: 987

Using Integer.toString() static method to convert an int value to String

ConvertIntToStringExample2.java

public class ConvertIntToStringExample2 {
    public static void main(String[] args) {
        int value1 = 456;
        String value2 = Integer.toString(value1);

        System.out.println("int value: " + value1);
        System.out.println("String value: " + value2);
    }
}

The output is:

int value: 456
String value: 456

Using Integer.toString() to return a String from an Integer object

ConvertIntToStringExample3.java

public class ConvertIntToStringExample3 {
    public static void main(String[] args) {
        Integer value1 = 123;
        String value2 = value1.toString();

        System.out.println("int value: " + value1);
        System.out.println("String value: " + value2);
    }
}

The output is:

int value: 123
String value: 123

Using String.format() to format an int value to String

ConvertIntToStringExample4.java

public class ConvertIntToStringExample4 {
    public static void main(String[] args) {
        Integer value1 = 67;
        String value2 = String.format("%d", value1);

        System.out.println("int value: " + value1);
        System.out.println("String value: " + value2);
    }
}

The output is:

int value: 67
String value: 67

Using DecimalFormat class to format int value to String

ConvertIntToStringExample5.java

import java.text.DecimalFormat;

public class ConvertIntToStringExample5 {
    public static void main(String[] args) {
        int value1 = 980;
        DecimalFormat decimalFormat = new DecimalFormat("#");
        String value2 = decimalFormat.format(value1);

        System.out.println("int value: " + value1);
        System.out.println("String value: " + value2);
    }
}

The output is:

int value: 980
String value: 980

Happy Coding 😊