1 import java.awt.*;
2 import javax.swing.*;
3 import java.awt.event.*;
4 /*
5 指示发生了组件定义的动作的语义事件。当特定于组件的动作（比如被按下）发生时，由组件（比如 Button）生成此高级别事件。
6 事件被传递给每一个 ActionListener 对象，这些对象是使用组件的 addActionListener 方法注册的，用以接收这类事件。
7 所以在给TextField类添加 ActionListener 类型的监听器时就会失败！
8
9 ****下面还有XXXListener和XXXAdapter的用法，相信你会喜欢上XXXAdapter的用法
10 */
11 public class stackDemo extends MouseAdapter{
12 JFrame fr=new JFrame("StackDemo");//对话框
13 JPanel pan= new JPanel();//菜单面板
14 JPanel panStack = new JPanel();
15 JButton pushBtn, popBtn, peekBtn;
16 JTextField tf= new JTextField("整数", 4);
17 JButton stackBtn[]= new JButton[10];
18
19 JPanel panStackPointerLabel= new JPanel();
20 JLabel stackPointerLabel = new JLabel("<-top");
21
22 JPanel panRet= new JPanel();
23 JTextField tfRet= new JTextField("操作结果！");
24
25 int top;
26
27 public stackDemo(){
28 fr.setSize(420,500);
29 fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
30 fr.setLayout(new FlowLayout(FlowLayout.CENTER, 10, 10));
31
32 pan.setPreferredSize(new Dimension(400, 50));
33 pan.setLayout(new FlowLayout(FlowLayout.CENTER, 10, 10));
34 panStack.setPreferredSize(new Dimension(80, 350));//设置栈面板大小
35 panStack.setBackground(Color.yellow);
36 pan.setBackground(Color.blue);
37 pan.add(new JLabel("操作菜单:"));
38 pan.add(pushBtn=new JButton("进栈"));
39 pushBtn.addMouseListener(new pushAction());
40 pan.add(popBtn=new JButton("出栈"));
41 popBtn.addMouseListener(new popAction());
42 pan.add(peekBtn=new JButton("栈顶元素"));
43
44 tf.addMouseListener(this);
45 pan.add(tf);
46
47 for(int i=0; i<10; ++i){
48 stackBtn[i]=new JButton(" ");
49 panStack.add(stackBtn[i]);
50 }
51 fr.add(pan);
52 fr.add(panStack);
53 panStackPointerLabel.setLayout(null);
54 panStackPointerLabel.setPreferredSize(new Dimension(80, 350));//设置指针面板的大小
55 panStackPointerLabel.setBackground(Color.LIGHT_GRAY);
56 stackPointerLabel.setFont(new Font("华文行楷", Font.BOLD, 20));
57 panStackPointerLabel.add(stackPointerLabel);
58
59 fr.add(panStackPointerLabel);
60 panRet.setLayout(new FlowLayout(FlowLayout.LEFT));
61 panRet.setBackground(Color.red);
62 panRet.setPreferredSize(new Dimension(400, 50));
63
64 tfRet.setEditable(false);//不能不编辑
65 panRet.add(tfRet);//操作结果面板
66 fr.add(panRet);
67 fr.setVisible(true);
68 stackPointerLabel.setBounds(0, stackBtn[9].getLocation().y, 50, 50);//设置栈顶指针位置
69 top=9;
70 }
71
72 public void mouseClicked(MouseEvent e){
73 tf.selectAll();//鼠标单击时选中全部文本
74 }
75
76 //push 按钮监听器
77 class pushAction implements MouseListener{
78 public void mouseClicked(MouseEvent e){
79 String text;
80
81 if((text=tf.getText())!=" "){
82 for(int i=0; i<text.length(); ++i)
83 if(!Character.isDigit(text.charAt(i)))
84 return ;
85 }
86 if(top<0){
87 tfRet.setText("栈顶溢出！");
88 return ;
89 }
90 Point pt=stackBtn[top].getLocation();
91 stackBtn[top].setText(text);
92 tfRet.setText("进栈值" + text);
93 stackPointerLabel.setBounds(0, pt.y, 50, 50);
94 --top;
95 }
96 public void mouseDragged(MouseEvent e){}
97 public void mouseEntered(MouseEvent e){}
98 public void mouseExited(MouseEvent e){}
99 public void mouseMoved(MouseEvent e){}
100 public void mouseReleased(MouseEvent e){}
101 public void mousePressed(MouseEvent e){}
102 }
103
104 //pop按钮监听器
105 class popAction extends MouseAdapter{
106 public void mouseClicked(MouseEvent e){
107 String text;
108 if(top>=9){
109 tfRet.setText("栈底溢出！");
110 return ;
111 }
112 ++top;
113 Point pt=stackBtn[top].getLocation();
114 text=stackBtn[top].getText();
115 tfRet.setText("出栈值" + text);
116 stackBtn[top].setText(" ");
117 stackPointerLabel.setBounds(0, pt.y, 50, 50);
118 }
119 }
120
121 public static void main(String args[]){
122 stackDemo mySstackDemo = new stackDemo();
123 }
124 }
java的栈图形演示
时间： 2025-01-13 00:36:59