How to format strings in Java

Problem Description

How to format strings?

Solution

Following example returns a formatted string value by using a specific locale, format and arguments in format() method

import java.util.*;

public class StringFormat{
   public static void main(String[] args){
      double e = Math.E;
      System.out.format("%f%n", e);
      System.out.format(Locale.GERMANY, "%-10.4f%n%n", e);
   }
}

Result

The above code sample will produce the following result.

2.718282
2,7183     

The following is an another sample example of format strings

public class HelloWorld {
   public static void main(String []args) {
      String name = "Hello World";
      String s1 = String.format("name %s", name);
      String s2 = String.format("value %f",32.33434);
      String s3 = String.format("value %32.12f",32.33434);
      System.out.print(s1);
      System.out.print("\n");
      System.out.print(s2);
      System.out.print("\n");
      System.out.print(s3);
      System.out.print("\n");
   }
}

Result

The above code sample will produce the following result.

name Hello World
value 32.334340
value                  32.334340000000