MoneyJFrame

import java.awt.Color;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;

public class MoneyJFrame extends JFrame implements CaretListener {
	private static final long serialVersionUID = 1L;
	private JTextField text_Money,text_Str;
	private MessageJDialog jdialog;
	
	public MoneyJFrame(){
		super("金额的中文大写形式");
		this.setBounds(300, 240, 450, 100);
		this.setResizable(false);
		this.getContentPane().setLayout(new FlowLayout(FlowLayout.RIGHT));
		this.setBackground(Color.LIGHT_GRAY);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		
		this.getContentPane().add(new JLabel("金额"));
		
		text_Money = new JTextField("12345.67",30);
		this.getContentPane().add(text_Money);
		
		this.getContentPane().add(new JLabel("中文大学形式"));
		
		text_Str = new JTextField(30);
		this.getContentPane().add(text_Str);
		text_Str.setEditable(false);
		
		text_Money.addCaretListener(this);
		this.caretUpdate(null);
		
		jdialog = new MessageJDialog(this);
		
		setVisible(true);
	}
	
	public static void main(String[] args) {
		new MoneyJFrame();
	}
	@Override
	public void caretUpdate(CaretEvent e) {
		try {
			double x = Double.parseDouble(text_Money.getText());
			text_Str.setText(RNBtoStr(x));
		} catch (Exception e2) {
			//JOptionPane.showConfirmDialog(this, text_Money.getText()+"无法转换成浮点数!");
			//JOptionPane.showMessageDialog(this,  text_Money.getText()+"无法转换成浮点数!");
			jdialog.show( text_Money.getText()+"无法转换成浮点数!" );
		}
	}

	private String RNBtoStr(double x) {
		String yuan="亿仟佰拾万仟佰拾圆角分";
		String digit="零壹贰叁肆伍陆柒捌玖";
		String result="";
		int y = (int) (x*100);
		int i = yuan.length()-1;
		while(y>0 && i>0){
			result = ""+digit.charAt(y%10)+yuan.charAt(i)+result;
			i--;
			y = y/10;
		}
		return result;
	}
}

</pre><p></p><pre name="code" class="java">import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class MessageJDialog extends JDialog{
	private static final long serialVersionUID = 1L;
	private JLabel jlable;
	private JFrame jframe;
	
	public MessageJDialog(JFrame jframe){
		super(jframe,"提示",true);
		this.jframe = jframe;
		this.setSize(300, 80);
		jlable = new JLabel("",JLabel.CENTER);
		this.getContentPane().add(jlable);
		this.setDefaultCloseOperation(HIDE_ON_CLOSE);
	}
	public void show(String msg){
		jlable.setText(msg);
		setLocation(jframe.getX()+100, jframe.getY()+100);
		setVisible(true);
	}
}