package frameDemo;



import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.GridLayout;



import javax.swing.*;



public class calculator  {



	/**

	 * @param args

	 */

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		

		calculator c=new calculator();



	}

	

	private JFrame _calculateJFrame;

	private JButton _mutilJButten,_DivJButton,_AddJButton,_subJButton;

	private JTextField jTextFileFirst,jTextFileSecond,jTextFileLast;

	private JPanel jPanelFirst,jPanelSecond,jPanelThird,jPanelFour;

	

	public calculator(){

		

		//_calculateJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

		_calculateJFrame=new JFrame("Calculator");

		_calculateJFrame.setLayout(new GridLayout(4,1));

		_calculateJFrame.setBounds(40, 30, 400, 380);

		_calculateJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

		



                //注意这行代码，如果放到最后不会显示在画布上添加的东西

		_calculateJFrame.setVisible(true);

		

		//添加四个画布

		jPanelFirst = new JPanel();

		jPanelSecond=new JPanel();

		jPanelThird=new JPanel();

		jPanelFour=new JPanel();

		

		_calculateJFrame.add(jPanelFirst);

		_calculateJFrame.add(jPanelSecond);

		_calculateJFrame.add(jPanelThird);

		_calculateJFrame.add(jPanelFour);

		

		//_calculateJFrame.setVisible(true);

		

		

		jPanelFirst.setLayout(null);

		jPanelFirst.setBackground(Color.yellow);

		jTextFileFirst=new JTextField();

		

		jPanelFirst.add(jTextFileFirst);

		

		jTextFileFirst.setSize( jPanelFirst.getWidth(),jPanelFirst.getHeight());

		//jTextFileFirst.setSize(100, 100);

		//jTextFileFirst.setBackground(Color.black);

		

		jPanelSecond.setLayout(null);

		jPanelSecond.setBackground(Color.red);

		jTextFileSecond=new JTextField();

		jTextFileSecond.setSize( jPanelSecond.getWidth(),jPanelSecond.getHeight());

		jPanelSecond.add(jTextFileSecond);

		

		

		jPanelThird.setLayout(null);

		jPanelThird.setBackground(Color.blue);

		

		//添加+ - * /

		_AddJButton=new JButton("+");

		jPanelThird.add(_AddJButton);

		//_AddJButton.setBounds(jPanelThird.getLocation().x,jPanelThird.getLocation().y,jPanelThird.getWidth()/4,jPanelThird.getHeight());