Different ways to concatenate a string in java

// Different ways of declaring and initializing Strings
package javaapplication1;


public class StringDemo {
 
    public static void main(String ar[])
    {
        String str ="Abhishek";
        String str1=new String(str);
        String str2=new String("Anoop");
        String str3=str2;
        System.out.println(str);
        System.out.println(str1);
        System.out.println(str2);
        System.out.println(str3);
    }
}