JAVA PROGRAM TO REMOVE A SUB STRING FROM A STRING USING STRING BUFFER CLASS

import java.io.*;
import java.lang.*;
import java.util.*;


class stringtest{

public static void main(String args[])
{

StringBuffer str1=new StringBuffer("Roses are red and beautiful");
String str2 = "are";



System.out.println("String before  removal \n "+str1);
int r,r1;

r=str1.indexOf(str2);
r1=str2.length();

if (r != -1) {
    str1.delete(r,r1+r);
} else{
System.out.println("Sub string not found");
}

System.out.println("String after removal  "+str1);
}
}
SAMPLE OUTPUT: