Basic String Operations in Java

public class StringOperations {

public static void main(String args[]){
String str1="Hello";
String str2="Ja va";
String str3="Hello";

// String Operations

System.out.println("String1 == String3"+ str1.equals(str3));
System.out.println("String2 at Index 2:"+str2.charAt(2));
System.out.println("Compare Str2 and Str3"+str2.compareTo(str3));
System.out.println("Compare str1 and str3"+str1.compareTo(str3));
System.out.println("String2 contains Ja: "+str2.contains("Ja"));
System.out.println("String is empty ?"+str1.isEmpty());
System.out.println("Sting HashCode"+ str1.hashCode());
System.out.println("Substring of String1"+str1.substring(2, 3));
System.out.println("Remove whitespaces in String2"+str2.trim());
System.out.println("Convert to LowerCase"+str2.toLowerCase());
System.out.println("Replace a with A"+str3.replace('a','A'));
}
}

OutPut:

========

String1 == String3true

String2 at Index 2: 

Compare Str2 and Str32

Compare str1 and str30

String2 contains Ja: true

String is empty ?false

Sting HashCode69609650

Substring of String1l

Remove whitespaces in String2Ja va

Convert to LowerCaseja va

Replace a with AHello