import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.*;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;


public class MoneyJFrame extends JFrame implements CaretListener{
	private JTextField text_money, text_str;
	private MessageJDialog jdialog;
	private JButton jbutton;
	public MoneyJFrame()
	{
		super("金额的中文大写形式");
		this.setBounds(300,240,360,90);
		this.setResizable(true);
		this.setBackground(java.awt.Color.LIGHT_GRAY);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.getContentPane().setLayout(new FlowLayout(FlowLayout.RIGHT));
		this.getContentPane().add(new JLabel("金额"));
		text_money = new JTextField("12345678.90",22);
		this.getContentPane().add(text_money);
		text_money.addCaretListener(this);
		this.getContentPane().add(new JLabel("中文大写形式"));
		text_str = new JTextField(22);
		text_str.setHorizontalAlignment(JTextField.RIGHT);
		text_str.setEditable(false);
		this.getContentPane().add(text_str);
		
		ImageIcon icon = new ImageIcon("D:\\Documents\\javaDemo\\TextBook\\src\\14.jpg");
		jbutton = new JButton("点我啊",icon);
		this.getContentPane().add(jbutton);
		 Dimension preferredSize = new Dimension(300,100);//设置尺寸
		jbutton.setPreferredSize(preferredSize);
		caretUpdate(null);
		this.setVisible(true);
		jdialog = new MessageJDialog();
	}
	public class MessageJDialog extends JDialog
	{
		private JLabel jlabel;
		public MessageJDialog()
		{
			super(MoneyJFrame.this,"提示",true);
			this.setSize(300,80);
			jlabel = new JLabel("",JLabel.CENTER);
			this.getContentPane().add(jlabel);
			this.setDefaultCloseOperation(HIDE_ON_CLOSE);
		}
		private void show(String message)
		{
			jlabel.setText(message);
			this.setLocation(MoneyJFrame.this.getX()+100, MoneyJFrame.this.getY()+100);
			this.setVisible(true);
		}
	}
	public void caretUpdate(CaretEvent ev)
	{
		try{
			double x = Double.parseDouble(text_money.getText());
			text_str.setText(RMBtoString(x));
		}
		catch(NumberFormatException nfex){
			jdialog.show(text_money.getText()+"不能转换成浮点数，请重新输入！");
		}
		finally{}
		
	}
	public static String RMBtoString(double x)
	{
		String yuan = "亿千百拾万千百十元角分";
		String digit = "零壹贰叁肆伍陆柒捌玖";
		String result = "";
		int y = (int)(x*200);
		for(int i = yuan.length()-1; y>0 && i>0; i--,y/=10)
			result = "" + digit.charAt(y%10)+yuan.charAt(i)+result;
		return result;
	}
	public static void main(String arg[])
	{
		new MoneyJFrame();
	}
}