import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Calculater extends JFrame implements ActionListener {
	private JPanel jPanel;
	private JPanel jPanel1;
	private Button button[] = new Button[24];
	private TextField TF;
	private String st = "";
	private JScrollPane jscrollPane;
	private JLabel label;
	
	public void Define() {
		JFrame jFrame = new JFrame("计算器");
		Container pane = jFrame.getContentPane();
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jPanel = new JPanel(new GridLayout(6,4,5,5));
		jPanel1 = new JPanel(new GridLayout(2,1,5,5));
		TF = new TextField(st);
		button[0] = new Button("sin");
		button[0].addActionListener(this);
		button[1] = new Button("cos");
		button[1].addActionListener(this);
		button[2] = new Button("tan");
		button[2].addActionListener(this);
		button[3] = new Button("e^x");
		button[3].addActionListener(this);
		button[4] = new Button("c");
		button[4].addActionListener(this);
		button[5] = new Button("÷");
		button[5].addActionListener(this);
		button[6] = new Button("×");
		button[6].addActionListener(this);
		button[7] = new Button("<-");
		button[7].addActionListener(this);
		button[8] = new Button("7");
		button[8].addActionListener(this);
		button[9] = new Button("8");
		button[9].addActionListener(this);
		button[10] = new Button("9");
		button[10].addActionListener(this);
		button[11] = new Button("-");
		button[11].addActionListener(this);
		button[12] = new Button("4");
		button[12].addActionListener(this);
		button[13] = new Button("5");
		button[13].addActionListener(this);
		button[14] = new Button("6");
		button[14].addActionListener(this);
		button[15] = new Button("+");
		button[15].addActionListener(this);
		button[16] = new Button("1");
		button[16].addActionListener(this);
		button[17] = new Button("2");
		button[17].addActionListener(this);
		button[18] = new Button("3");
		button[18].addActionListener(this);
		button[19] = new Button("log");
		button[19].addActionListener(this);
		button[20] = new Button("%");
		button[20].addActionListener(this);
		button[21] = new Button("0");
		button[21].addActionListener(this);
		button[22] = new Button(".");
		button[22].addActionListener(this);
		button[23] = new Button("=");
		button[23].addActionListener(this);
		jPanel.add(button[0]);
		jPanel.add(button[1]);
		jPanel.add(button[2]);
		jPanel.add(button[3]);
		jPanel.add(button[4]);
		jPanel.add(button[5]);
		jPanel.add(button[6]);
		jPanel.add(button[7]);
		jPanel.add(button[8]);
		jPanel.add(button[9]);
		jPanel.add(button[10]);
		jPanel.add(button[11]);
		jPanel.add(button[12]);
		jPanel.add(button[13]);
		jPanel.add(button[14]);
		jPanel.add(button[15]);
		jPanel.add(button[16]);
		jPanel.add(button[17]);
		jPanel.add(button[18]);
		jPanel.add(button[19]);
		jPanel.add(button[20]);
		jPanel.add(button[21]);
		jPanel.add(button[22]);
		jPanel.add(button[23]);
		jPanel1.add(TF);
		jPanel1.add(jPanel);
		jscrollPane = new JScrollPane(label,ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
		pane.add(jPanel1,BorderLayout.WEST);
		pane.add(jscrollPane,BorderLayout.EAST);
		jFrame.pack();
		jFrame.setVisible(true);
	}
	
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getActionCommand() == "0") {
			st = st + "0";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "1") {
			st = st + "1";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "2") {
			st = st + "2";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "3") {
			st = st + "3";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "4") {
			st = st + "4";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "5") {
			st = st + "5";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "6") {
			st = st + "6";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "7") {
			st = st + "7";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "8") {
			st = st + "8";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "9") {
			st = st + "9";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == ".") {
			st = st + ".";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "+") {
			st = st + "+";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "-") {
			st = st + "-";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "×") {
			st = st + "×";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "÷") {
			st = st + "÷";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "sin") {
			st = st + "sin";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "cos") {
			st = st + "cos";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "tan") {
			st = st + "tan";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "%") {
			st = st + "%";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "e^x") {
			st = st + "e^";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "log") {
			st = st + "log";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "c") {
			st = "";
			this.TF.setText(st);
		}
		if(e.getActionCommand() == "=") {
			st = "你的算法";
			this.TF.setText(st);
		}
	}
	
	public static void main(String arg[]) {
		Calculater A = new Calculater();
		A.Define();
	}
}