C#的委托(以WinForm为例) 在子窗体(ChildFrm)中定义一个委托 this.CaptureListener(callback);//子窗体触发委托事件,以告诉调用的窗体 /// <summary> /// 子窗体:在子窗体中定义一个委托,供调用都设置侦听,并可与此窗体的某个事件同时执行自身指定的事件 /// 定义 委托 /// </summary> public partial class ChildFrm : Form { public ChildFrm() { I
import java.awt.*; import java.util.Scanner; import javax.swing.*; public class Test_16_13 extends JFrame{ public Test_16_13(){ ImageIcon im = new ImageIcon("image/slide1.jpg"); String s = "jlabel_mine"; JLabel1 j1 = new JLabel1(s); ad
需要重写hashCode()和equals()方法才可以实现自定义键在HashMap中的查找. public class PhoneNumber { private int prefix; //区号 private int phoneNumber; //电话号 public PhoneNumber(int prefix, int phoneNumber) { this.prefix = prefix; this.phoneNumber = phoneNumber; } } import ja