Write a Java program to practice using String class and its methods.

Write a Java program to practice using String class and its methods.

Program Code:

import java.lang.String;

class stringdemo

{

public static void main(String arg[])

{

String s1=new String("gpt gulbarga");

String s2="GPT GULBARGA";

System.out.println(" The string s1 is : " +s1);

System.out.println(" The string s1 is : " +s2);

System.out.println(" Length of the string s1 is : " +s1.length());

System.out.println(" The first accurence of r is at the position : " +s1.indexOf('r'));

System.out.println(" The String in Upper Case : " +s1.toUpperCase());

System.out.println(" The String in Lower Case : " +s1.toLowerCase());

System.out.println(" s1 equals to s2 : " +s1.equals(s2));

System.out.println(" s1 equals ignore case to s2 : " +s1.equalsIgnoreCase(s2));

int result=s1.compareTo(s2);

System.out.println("After compareTo()");

if(result==0)

System.out.println( s1 + " is equal to "+s2);

else if(result>0)

System.out.println( s1 + " is greather than to "+s2);

else

System.out.println( s1 + " is smaller than to "+s2);

System.out.println(" Character at an index of 6 is :" +s1.charAt(6));

String s3=s1.substring(4,12);

System.out.println(" Extracted substring is :"+s3);

System.out.println(" After Replacing g with a in s1 : " + s1.replace('g','a'));

String s4=" This is a book ";

System.out.println(" The string s4 is :"+s4);

System.out.println(" After trim() :"+s4.trim());

}

}

Output:

The string s1 is : gpt gulbarga

The string s1 is : GPT GULBARGA

Length of the string s1 is : 12

The first accurence of r is at the position : 9

The String in Upper Case : GPT GULBARGA

The String in Lower Case : gpt gulbarga

s1 equals to s2 : false

s1 equals ignore case to s2 : true

After compareTo()

gpt gulbarga is greather than to GPT GULBARGA

Character at an index of 6 is :l

Extracted substring is :gulbarga

After Replacing g with a in s1 : apt aulbaraa

The string s4 is : This is a book

After trim() :This is a book