Convert long to String in Java

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

Using String.valueOf() method to return a String from long value

ConvertLongToStringExample1.java

public class ConvertLongToStringExample1 {
    public static void main(String[] args) {
        long value1 = 123456789;
        String value2 = String.valueOf(value1);

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

The output is:

long value: 123456789
String value: 123456789

Convert String to long value using Long.toString() method

ConvertLongToStringExample2.java

public class ConvertLongToStringExample2 {
    public static void main(String[] args) {
        long value1 = 987654321;
        String value2 = Long.toString(value1);

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

The output is:

long value: 987654321
String value: 987654321

Using Long.toString() method to return a String from a Long object

ConvertLongToStringExample3.java

public class ConvertLongToStringExample3 {
    public static void main(String[] args) {
        Long value1 = Long.valueOf(123456);
        String value2 = value1.toString();

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

The output is:

long value: 123456
String value: 123456

Format a long as String using String.format() method

ConvertLongToStringExample4.java

public class ConvertLongToStringExample4 {
    public static void main(String[] args) {
        long value1 = 987654;
        String value2 = String.format("%d", value1);

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

The output is:

long value: 987654
String value: 987654

Format a long value as a String using DecimalFormat class

ConvertLongToStringExample5.java

import java.text.DecimalFormat;

public class ConvertLongToStringExample5 {
    public static void main(String[] args) {
        long value1 = 200000;
        DecimalFormat decimalFormat = new DecimalFormat("#");
        String value2 = decimalFormat.format(value1);

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

The output is:

long value: 200000
String value: 200000

Happy Coding 😊