Java String Methods

String class has a lot of methods in Java to manipulate strings, finding length, format strings, concatenate, etc.

Following are some of the string methods in Java −

Example

Here, we will find the length of strings and concatenate them −

public class Main {
   public static void main(String args[]) {
      String str1 = "This is ";
      String str2 = "it!";
      System.out.println("String1 = "+str1);
      System.out.println("String2 = "+str2);
      int len1 = str1.length();
      System.out.println( "String1 Length = " + len1 );
      int len2 = str2.length();
      System.out.println( "String2 Length = " + len2 );
      System.out.println("Performing Concatenation...");
      System.out.println(str1 + str2);
   }
}

Output

String1 = This is
String2 = it!
String1 Length = 8
String2 Length = 3
Performing Concatenation...
This is it!

Let us see another example wherein we are comparing this string to the specified object −

Example

import java.util.*;
public class Demo {
   public static void main( String args[] ) {
      String Str1 = new String("This is really not immutable!!");
      String Str2 = Str1;
      String Str3 = new String("This is really not immutable!!");
      boolean retVal;
      retVal = Str1.equals( Str2 );
      System.out.println("Returned Value = " + retVal );
      retVal = Str1.equals( Str3 );
      System.out.println("Returned Value = " + retVal );
   }
}

Output

Returned Value = true
Returned Value = true