6. Array and String in Java

package lesson7;

public class array {

	public static void main(String[] args) {
		
		int[] my_int_array = {0, 1, 2, 3, 4, 5};
		/* int my_int_array[] = {0, 1, 2, 3, 4, 5};
		 * int[] my_int_array = new int[3];
		 * int[] my_int_array = new int[]{1, 2, 3}
		*/
		int index = 0;
		while(index <= 5) {
			System.out.println("int array " + index + " is " + my_int_array[index]);
			index++;
		}

}
}

Quite similar, only the format has slight differences with C.

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'));

	}

}