Java练习——实验15 图形用户界面设计（2）
1.实验目的
掌握焦点、鼠标租键盘事件。
2.实验介绍
任何组件上都可以发生鼠标事件，如鼠标迸人组件退出组件、在组件上方单击鼠标、拖动鼠标等都触发鼠标事件，即导致MouseEvent类自动创建一个事件对象。事件源注册监视器的方法是addMouseListener( MouseListenerlistener)。 当某个组件处于激活状态时，如果用户敲击键盘上一个键就导致这个组件触发KeyEvent 事件。使用KeyListener接口处理键盘事件。组件T以触发焦点事件，当组件具有焦点监视器后，如果组件从尤输人焦点变成有输入焦点或从有输入焦点变成无输人焦点郡会触发FOCuSEVent事件。使用FocusListener接口处理焦点盲件。
3.实验内容
华容道是大家很熟悉的一个传统智力游戏。编写GUI 程序，用户通过键盘柯鼠标事件来实现曹操、关羽等人物的移动。
4. 实验步骤与代码
Person.java
package text15;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import javax.swing.JButton;
public class Person extends JButton implements FocusListener {
int number;
Color c = new Color(255, 245, 170);
Font font = new Font("宋体", Font.BOLD, 12);
Person(int number, String s) {
super(s);
setBackground(c);
setFont(font);
this.number = number;
c = getBackground();
addFocusListener(this);
}
@Override
public void focusGained(FocusEvent arg0) {
// TODO Auto-generated method stub
setBackground(Color.red);
}
@Override
public void focusLost(FocusEvent arg0) {
// TODO Auto-generated method stub
setBackground(c);
}
}
MainClass.java
package text15;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import javax.swing.JButton;
public class Person extends JButton implements FocusListener {
int number;
Color c = new Color(255, 245, 170);
Font font = new Font("宋体", Font.BOLD, 12);
Person(int number, String s) {
super(s);
setBackground(c);
setFont(font);
this.number = number;
c = getBackground();
addFocusListener(this);
}
@Override
public void focusGained(FocusEvent arg0) {
// TODO Auto-generated method stub
setBackground(Color.red);
}
@Override
public void focusLost(FocusEvent arg0) {
// TODO Auto-generated method stub
setBackground(c);
}
}
Hua_Rong_Road.java
package text15;
import java.awt.Color;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
// ,,
public class Hua_Rong_Road extends JFrame implements ActionListener,
MouseListener, KeyListener {
Person person[] = new Person[10];
JButton left, right, above, below;
JButton restart = new JButton("重新开始");
public Hua_Rong_Road() {
init();
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setBounds(100, 100, 320, 500);
setVisible(true);
validate();
}
public void init() {
setLayout(null);
add(restart);
restart.setBounds(100, 320, 120, 35);
restart.addActionListener(this);
String name[] = { "曹操", "关羽", "张", "刘", "周", "黄", "兵", "兵", "兵", "兵" };
for (int k = 0; k < name.length; k++) {
person[k] = new Person(k, name[k]);
person[k].addMouseListener(this);
person[k].addKeyListener(this);
add(person[k]);
}
person[0].setBounds(104, 54, 100, 100);
person[1].setBounds(104, 154, 100, 50);
person[2].setBounds(54, 154, 50, 100);
person[3].setBounds(204, 154, 50, 100);
person[4].setBounds(54, 54, 50, 100);
person[5].setBounds(204, 54, 50, 100);
person[6].setBounds(54, 254, 50, 50);
person[7].setBounds(204, 254, 50, 50);
person[8].setBounds(104, 204, 50, 50);
person[9].setBounds(154, 204, 50, 50);
person[9].requestFocus();
left = new JButton();// 四个边界
right = new JButton();
above = new JButton();
below = new JButton();
add(left);
add(right);
add(above);
add(below);
left.setBounds(49, 49, 5, 260);
right.setBounds(254, 49, 5, 260);
above.setBounds(49, 49, 210, 5);
below.setBounds(49, 304, 210, 5);
validate();
}
@Override
public void keyPressed(KeyEvent e) {
Person man = (Person) e.getSource();
if (e.getKeyCode() == KeyEvent.VK_DOWN)
go(man, below);
if (e.getKeyCode() == KeyEvent.VK_UP)
go(man, above);
if (e.getKeyCode() == KeyEvent.VK_LEFT)
go(man, left);
if (e.getKeyCode() == KeyEvent.VK_RIGHT)
go(man, right);
}
public void keyReleased(KeyEvent e) {
}
public void keyTyped(KeyEvent e) {
}
public void mousePressed(MouseEvent e) {
Person man = (Person) e.getSource();
int x = -1, y = -1;
x = e.getX();
y = e.getY();
int w = man.getBounds().width;
int h = man.getBounds().height;
if (y > h / 2)
go(man, below);
if (y < h / 2)
go(man, above);
if (x < w / 2)
go(man, left);
if (x > w / 2)
go(man, right);
}
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void go(Person man, JButton direction) {
boolean move = true;
Rectangle manRect = man.getBounds();
int x = man.getBounds().x;
int y = man.getBounds().y;
if (direction == below)
y = y + 50;
else if (direction == above)
y = y - 50;
else if (direction == left)
x = x - 50;
else if (direction == right)
x = x + 50;
manRect.setLocation(x, y);
Rectangle dirctionRect = direction.getBounds();
for (int k = 0; k < 10; k++) {
Rectangle personRect = person[k].getBounds();
if ((manRect.intersects(personRect)) && (man.number != k))
move = false;
}
if (manRect.intersects(dirctionRect))
move = false;
if (move == true)
man.setLocation(x, y);
}
public void actionPerformed(ActionEvent e) {
dispose();
new Hua_Rong_Road();
}
}
5.实验结果
