Java对话框详细实例能得到用户的各种选择

package hytc.hehuahong; import java.awt.*; import java.awt.event.*; import javax.swing.*; @SuppressWarnings("serial") public class DemoInputDialog extends JFrame implements ActionListener { JLabel messgeJLb; JButton inputDialogJBtn; JButton messageDialogJBtn; JButton confirmDialogJBtn; JButton optionDialogJBtn; public DemoInputDialog(){ messgeJLb=new JLabel(); messgeJLb.setHorizontalAlignment(SwingConstants.CENTER); messgeJLb.setFont(new Font("宋体",Font.PLAIN,28)); messgeJLb.setText(getName()); System.out.println(JOptionPane.CLOSED_OPTION); System.out.println(JOptionPane.YES_OPTION); System.out.println(JOptionPane.NO_OPTION); System.out.println(JOptionPane.CANCEL_OPTION); System.out.println(JOptionPane.OK_OPTION); //对话框 inputDialogJBtn=new JButton("InputDialog"); inputDialogJBtn.setActionCommand("inputDialog"); inputDialogJBtn.addActionListener(this); messageDialogJBtn=new JButton("MessageDialog"); messageDialogJBtn.setActionCommand("MessageDialog"); messageDialogJBtn.addActionListener(this); confirmDialogJBtn=new JButton("ConfirmDialog"); confirmDialogJBtn.setActionCommand("ConfirmDialog"); confirmDialogJBtn.addActionListener(this); optionDialogJBtn=new JButton("OptionDialog"); optionDialogJBtn.setActionCommand("OptionDialog"); optionDialogJBtn.addActionListener(this); // this.add(messgeJLb,BorderLayout.NORTH); this.add(messageDialogJBtn,BorderLayout.CENTER); this.add(inputDialogJBtn,BorderLayout.EAST); this.add(confirmDialogJBtn,BorderLayout.WEST); this.add(optionDialogJBtn,BorderLayout.SOUTH); this.setBounds(20,20,500,350); this.setTitle("InputDialog examp"); this.setVisible(true); this.setDefaultCloseOperation(EXIT_ON_CLOSE); } public void actionPerformed(ActionEvent e){ int messageType; if(e.getActionCommand().equals("inputDialog")){ String message="请输入内容："; String messageTitle="输入对话框"; messageType=JOptionPane.INFORMATION_MESSAGE; String inputMessage=(String) JOptionPane.showInputDialog(this,message,messageTitle,messageType); //必须先判断是否味null if(inputMessage !=null && !inputMessage.equals("")){ this.messgeJLb.setText(inputMessage); } else { this.messgeJLb.setText("没有输入内容！"); JOptionPane.showMessageDialog(this, "没有输入内容！", "提示", messageType); // int result=JOptionPane.showMessageDialog(this, "没有输入内容！", "提示", messageType); // switch(result){ // case (int)JOptionPane.OK_OPTION: // this.messgeJLb.setText("OK_OPTION");break; // default :this.messgeJLb.setText("CLOSED_OPTION");break; // }没有返回值 } } else if(e.getActionCommand().equals("ConfirmDialog")){ messageType=JOptionPane.INFORMATION_MESSAGE; int result=JOptionPane.showConfirmDialog(this, "ConfirmDialog", "test", messageType, JOptionPane.YES_NO_CANCEL_OPTION); switch(result){ case (int)JOptionPane.YES_OPTION: this.messgeJLb.setText("Yes_OPTION");break; case (int)JOptionPane.NO_OPTION: this.messgeJLb.setText("NO_OPTION");break; case (int)JOptionPane.CANCEL_OPTION: this.messgeJLb.setText("CANCEL_OPTION");break; default :this.messgeJLb.setText("CLOSED_OPTION");break; } } else if(e.getSource()==optionDialogJBtn){ Object []options={"ni hao","Hello"}; messageType=JOptionPane.INFORMATION_MESSAGE; int result=JOptionPane.showOptionDialog(this, "optionDialogJBtn", "test", JOptionPane.OK_CANCEL_OPTION, messageType,null,options,options[1]); this.messgeJLb.setText(options[result].toString()); } } public static void main(String[] args) { new DemoInputDialog(); } }