方法重载3

package ch3;
public class MyClass1 {
  public int a = 5; 
  int b = 10;
  protected int c = 20;
  int d = 30;
  public void func1(){
    System.out.println("func1");
  } 
  void func2(){
    System.out.println("func2");
    System.out.println(b);
  }
  protected void func3(){
    System.out.println("func3");
  }
  void func4(){
    System.out.println("func4");
  }
}