Java - convert int to String

// solution 1

String str1 = String.valueOf(123); // 123

​

// solution 2

String str2 = Integer.toString(123); // 123

​

// solution 3

String str3 = "" + 123; // 123

public class Example1 {

​

    public static void main(String[] args) {

        int num = 123;

        String str = String.valueOf(num);

        System.out.println(str); // 123

    }

}

123

public class Example2 {

​

    public static void main(String[] args) {

        int num = 123;

        String str = Integer.toString(num);

        System.out.println(str); // 123

    }

}

123

public class Example3 {

​

    public static void main(String[] args) {

        int num = 123;

        String str = "" + num;

        System.out.println(str); // 123

    }

}

123

public class Example4 {

​

    public static void main(String[] args) {

        int num = 123;

        String str = String.format("%d", num);

        System.out.println(str); // 123

    }

}

123

public class Example5 {

​

    public static void main(String[] args) {

        int num = 123;

        StringBuilder sb = new StringBuilder();

        sb.append(num);

        String str = sb.toString();

        System.out.println(str); // 123

    }

}

123

import java.text.DecimalFormat;

​

public class Example6 {

​

    public static void main(String[] args) {

        int num = 123;

        DecimalFormat df = new DecimalFormat("#");

        String str = df.format(num);

        System.out.println(str); // 123

    }

}

123

import java.text.DecimalFormat;

​

public class Example7 {

​

    public static void main(String[] args) {

        int num = 12345;

        DecimalFormat df = new DecimalFormat("#,##0");

        String str = df.format(num);

        System.out.println(str); // 12,345

    }

}

12,345