String operations

So there are various Functions that we could perform on string so just keep looking at the examples given
Discription will be given along with
To begin with--

1- how to declare  a string and various ways
this just prints java on the screen
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
import java.lang.*;
import java.io.*;
class f
{
public static void main(String arg[]){
char a[]={'j','a','v','a'};

String s1=new String(a);
String s2=new String(s1);
System.out.println(""+s1);
System.out.println(""+s2);
}}

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2-We can also combine different strings as follows
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
import java.lang.*;
import java.io.*;
class f
{
public static void main(String arg[]){
char a[]={'j','a','v','a'};

String s1=new String(a);
String s2=new String(s1);
System.out.println(""+s1);
System.out.println(""+s2);
String s3=new String(s2+s1);
System.out.println(s3);
}}
]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
3- Lets see something more for example if we want only jav to be printed or av or va then see below
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
import java.lang.*;
import java.io.*;
class f
{
public static void main(String arg[]){
char a[]={'j','a','v','a'};

String s1=new String(a);
String s2=new String(s1);
String s4=new String(a,0,3);//(prints characters form 0-3)
System.out.println(""+s1);
System.out.println(""+s2);
String s3=new String(s2+s1);
System.out.println(s3);
System.out.println(s4);//output=jav
}}
]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
THATS ALL FOR NOW BUT CHECK MY NEXT POSTS FOR MORE AND LET ME KNOW IF THERE IS ANY PROBLEM