package ren.redface.demo;
import java.awt.*;
import java.awt.event.*;
public class Jisuanqi {
public static void main(String[] args) {
new MyFrame("计算器");
}
}
class MyFrame extends Frame {
private static final long serialVersionUID = 1L;
private TextArea ta, tb;
public MyFrame(String title) {
super(title);
SetTextAreas();
SetButtonArea();
SetMainFram();
}
private void SetButtonArea() {
addButton("7", 33, 28, 20, 178);
addButton("8", 33, 28, 58, 178);
addButton("9", 33, 28, 96, 178);
addButton("/", 33, 28, 134, 178);
addButton("%", 33, 28, 172, 178);
addButton("4", 33, 28, 20, 210);
addButton("5", 33, 28, 58, 210);
addButton("6", 33, 28, 96, 210);
addButton("*", 33, 28, 134, 210);
addButton("1/x", 33, 28, 172, 210);
addButton("1", 33, 28, 20, 242);
addButton("2", 33, 28, 58, 242);
addButton("3", 33, 28, 96, 242);
addButton("-", 33, 28, 134, 242);
addButton("0", 71, 28, 20, 274);
addButton(".", 33, 28, 96, 274);
addButton("+", 33, 28, 134, 274);
addButton("=", 33, 60, 172, 242);
}
double m, n;
String k;
boolean flag = true;
boolean flag2 = false;
private void addButton(String string, int i, int j, int x, int y) {
final Button b = new Button(string);
b.setLocation(x, y);
b.setSize(i, j);
b.setFont(new Font("标楷体", Font.BOLD, 15));
b.setBackground(Color.pink);
b.setForeground(Color.darkGray);
b.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
counts();
}
private void counts() {
if (ta.getText().equals("") && (b.getActionCommand().equals("+") || b.getActionCommand().equals("-")
|| b.getActionCommand().equals("*") || b.getActionCommand().equals("/")
|| b.getActionCommand().equals("%") || b.getActionCommand().equals("1/x")
|| b.getActionCommand().equals("="))) {
} else if (ta.getText().equals(".") && (b.getActionCommand().equals("+")
|| b.getActionCommand().equals("-") || b.getActionCommand().equals("*")
|| b.getActionCommand().equals("/") || b.getActionCommand().equals("%")
|| b.getActionCommand().equals("1/x") || b.getActionCommand().equals("="))) {
} else {
if (b.getActionCommand().equals("+") || b.getActionCommand().equals("-")
|| b.getActionCommand().equals("*") || b.getActionCommand().equals("%")
|| b.getActionCommand().equals("1/x") || b.getActionCommand().equals("/")) {
if (flag2 = true) {
flag2 = false;
}
if (flag) {
n = new Double(ta.getText()).doubleValue();
flag = false;
} else {
if (k == "=") {
} else {
m = new Double(ta.getText()).doubleValue();
if (k == "-") {
if (n == 0)
n = m;
else
n = n - m;
} else if (k == "+") {
if (n == 0)
n = m;
else
n = n + m;
} else if (k == "*") {
if (n == 0)
n = m;
else
n = n * m;
} else if (k == "%") {
if (n == 0)
n = m;
else
m = m * 100;
} else if (k == "1/x") {
if (n == 0)
n = m;
else
n = 1 / m;
} else if (k == "/") {
if (n == 0)
n = m;
else
n = n / m;
}
}
}
k = b.getActionCommand();
ta.setText("");
} else if (b.getActionCommand().equals("=")) {
m = new Double(ta.getText()).doubleValue();
if (k == "+") {
ta.setText("");
ta.append(n + "+" + m);
ta.append(System.getProperty("line.separator"));
n = n + m;
ta.append("=" + n);
} else if (k == "-") {
ta.setText("");
ta.append(n + "-" + m);
ta.append(System.getProperty("line.separator"));
n = n - m;
ta.append("=" + n);
} else if (k == "*") {
ta.setText("");
ta.append(n + "*" + m);
ta.append(System.getProperty("line.separator"));
n = n * m;
ta.append("=" + n);
} else if (k == "%") {
ta.setText("");
ta.append("%" + m);
ta.append(System.getProperty("line.separator"));
m = m * 100;
ta.append("=" + m + "%");
} else if (k == "1/x") {
ta.setText("");
ta.append(1 + "/" + m);
ta.append(System.getProperty("line.separator"));
n = 1 / m;
ta.append("=" + n);
} else if (k == "/") {
ta.setText("");
ta.append(n + "/" + m);
ta.append(System.getProperty("line.separator"));
n = n / m;
ta.append("=" + n);
}
k = "=";
flag2 = true;
} else {
if (flag2) {
flag = true;
flag2 = false;
ta.setText("");
m = n = 0;
}
ta.append(b.getActionCommand());
}
}
}
});
this.add(b);
}
private void SetTextAreas() {
ta = new TextArea("0", 8, 52, 3);
ta.setBackground(Color.lightGray);
ta.setSize(190, 50);
ta.setFont(new Font("标楷体", Font.BOLD, 15));
ta.setLocation(20, 60);
this.add(ta);
tb = new TextArea(" DESIGN BY Alec", 8, 52, 3);
tb.setBackground(Color.pink);
tb.setSize(190, 25);
tb.setFont(new Font("标楷体", Font.BOLD, 16));
tb.setForeground(Color.blue);
tb.setLocation(20, 130);
this.add(ta);
this.add(tb);
}
@SuppressWarnings("deprecation")
private void SetMainFram() {
this.setLayout(null);
this.setSize(220, 310);
this.setVisible(true);
this.setLocation(310, 340);
this.setResizable(false);
ta.setEditable(false);
tb.setEditable(false);
this.setCursor(Cursor.HAND_CURSOR);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}
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