8. String in Java

package lesson8;

public class Srting {

	public static void main(String[] args) {
		
		String myString = "Hello"+" Dude!"; // "Hello Dude!"
		int myStringLength = myString.length();
		System.out.println(myStringLength);
		
		String myStringLowerCase = myString.toLowerCase();
		System.out.println(myStringLowerCase);
		
		String myStringUpperCase = myString.toUpperCase();
		System.out.println(myStringUpperCase);
		
		System.out.println(myStringUpperCase.replace('E', 'X')); 
		System.out.println(myStringUpperCase.indexOf('D'));

	}

}

Some basic operation of strings:
string.length();
string.toLowerCase();
string.toUpperCase();
string.replace(“a”,“b”);
string.indexOf(“a”);

Tips:
If you do not want to change original string, state a new string variable first.

Basic Operations in Java Done.