java的栈图形演示

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            import java.awt.*;
  2import javax.swing.*;
  3import 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*/ 11publicclass 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 25int top;
 26 27public 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 47for(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 72publicvoid 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 77class pushAction implements MouseListener{
 78publicvoid mouseClicked(MouseEvent e){
 79          String text;
 80 81if((text=tf.getText())!="   "){
 82for(int i=0; i<text.length(); ++i)
 83if(!Character.isDigit(text.charAt(i)))
 84return ;
 85          }
 86if(top<0){
 87              tfRet.setText("栈顶溢出！");
 88return ;
 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       }
 96publicvoid mouseDragged(MouseEvent e){}
 97publicvoid mouseEntered(MouseEvent e){}
 98publicvoid mouseExited(MouseEvent e){}
 99publicvoid mouseMoved(MouseEvent e){}
100publicvoid mouseReleased(MouseEvent e){}
101publicvoid mousePressed(MouseEvent e){}
102   }
103104//pop按钮监听器105class popAction extends MouseAdapter{
106publicvoid mouseClicked(MouseEvent e){
107          String text;
108if(top>=9){
109             tfRet.setText("栈底溢出！");
110return ;
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   }
120121publicstaticvoid main(String args[]){
122       stackDemo mySstackDemo = new stackDemo();
123   }
124 }