String

public static void main(String[] args) {
		
	    String word1 = "JAVA";
	    String word2 = "CSharp";
	    String word3 = "Object Oriented Programming";
	    char[] array1 = new char [4];
	    
	    
	    System.out.println(word1.charAt(3));
	    System.out.println(word1.contains("va"));
	    System.out.println(word1.equals(word2));
	    System.out.println(word1.indexOf("C"));
	    System.out.println(word1.isEmpty());
	    System.out.println(word1.lastIndexOf("A"));
	    System.out.println(word3.replace(" ", " - "));
	    System.out.println(word3);
	    System.out.println(word3.startsWith("O"));
	    System.out.println(word1.substring(0));
	    System.out.println(word1.substring(0, 2));
	    System.out.println(word1.toCharArray());
	    
	    array1=word1.toCharArray();
	    System.out.println(array1[0]);
	    
	    System.out.println(word1.toLowerCase());
	    System.out.println(word1.toUpperCase());
	    System.out.println();
	    
	    

	}