Java Class and extends Class (Inheritant)

public class MyClass extends MemberProfile

package com.java.myapp;

public class MemberProfile {
	
	public static String address = "Bangkok Thailand";
	
	public static void displayFullname() {
		
		System.out.println("Weerachai Nukitram");
		
    }

}

package com.java.myapp;

public class MyClass extends MemberProfile {
	
	public static void main(String[] args) {
		
		displayFullname();
		
		System.out.println(address);
	
    }
	
}

public class MyFormApp extends javax.swing.JFrame {

public class MainActivity extends Activity {