#今天上課學的程式，筆記僅自己看得懂#
源程式會用到的圖檔庫
（直接下載下傳——》解壓-》打開eclipse 或其他IDE -》複制圖檔庫到工程目錄下）
https://www.lanzous.com/i4vr1ib
效果：
源程式：
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
//封裝工具類
class LocationUtil {
private static JFrame fram;
private static boolean isDraging = false;
private static int xx, yy;
private LocationUtil() {
}
public static void yidong(JFrame frame) {
fram = frame;
fram.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {// 滑鼠點選觸發
// TODO Auto-generated method stub
super.mousePressed(e);
isDraging = true;
// 相對于面闆的位置
xx = e.getX();
yy = e.getY();// getX()和getY()傳回事件相對于源元件的水準 x 坐标和y坐标。
System.out.println("==" + xx + ":" + yy);
}
});
frame.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {// 滑鼠拖拽觸發
super.mouseDragged(e);
if (isDraging) {
// 相對于電腦螢幕的位置
int left = fram.getLocation().x;
int top = fram.getLocation().y;
System.out.println("-------------------------");
System.out.println(left + " " + top);
System.out.println(e.getX() + " " + e.getX());
System.out.println("-------------------------");
fram.setLocation(left + e.getX() - xx, top + e.getY() - yy);
}
}
});
}
}
public class Calculator extends JFrame {
// 全局
String operaString = "";// 操作符
double n1 = 0;// 字元串的double值
double n2 = 0;
double result = 0;// n1和n2的運算結果
StringBuilder number1 = new StringBuilder();// 字元串
StringBuilder number2 = new StringBuilder();
JLabel label;// 背景标簽
JButton close;// 關閉按鈕
ClacuatorClick click;// 監聽對象
// 顯示的label
JLabel labelr;
JButton kt, daidai, haiyang;
// Array
JButton[][] butsButtons = new JButton[4][5];
String[][] comand = { { "c", "+", "-", "*", "/" },
{ "", "1", "2", "3", "" },
{ "0", "4", "5", "6", "=" },
{ ".", "7", "8", "9" } };
public Calculator() {
this.setBounds(300, 200, 290, 383);
this.setUndecorated(true);// 去邊框
this.setIconImage(new ImageIcon("image/case03/icon.jpg").getImage());
// 這個JFrame面闆的小面闆的樣子，即Windows下的工作列的那個
/*
* JPanel panel = new JPanel(); panel.setBackground(Color.BLACK);
*
* this.add(panel);
*/
label = new JLabel(new ImageIcon("image/case03/back.png"));
this.add(label);
// 關閉
close = new JButton(new ImageIcon("image/case03/close.png"));
// 指派當遇到什麼的時候退出
close.setActionCommand("退出");
close.setBounds(210, 20, 24, 23);
close.setBorderPainted(false);
close.setContentAreaFilled(false);
label.add(close);
labelr = new JLabel("hello kitty ");
labelr.setBounds(25, 70, 235, 57);
labelr.setFont(new java.awt.Font("Dialog", 1, 30));
//"Dialog"為字型，1為加粗（如果設為0則為不加粗），30為字型大小
labelr.setForeground(Color.RED);//字型顔色
label.add(labelr);
kt = new JButton("kt");
kt.setBounds(20, 145, 60, 20);
kt.setBorderPainted(false);
kt.setContentAreaFilled(false);
label.add(kt);
daidai = new JButton("daidai");
daidai.setBounds(90, 145, 80, 20);
daidai.setBorderPainted(false);
daidai.setContentAreaFilled(false);
label.add(daidai);
haiyang = new JButton("haiyang");
haiyang.setBounds(180, 145, 80, 20);
haiyang.setBorderPainted(false);
haiyang.setContentAreaFilled(false);
label.add(haiyang);
LocationUtil.yidong(this);// 通過拖拽移動面闆方法
haiyang.setActionCommand("");
daidai.setActionCommand("");
kt.setActionCommand("");// 在 後面監聽類中getActionCommand會擷取到辨別此事件指令的字元串，
// 如果不修改一下為空字元串，将會直接去擷取按鈕的名字
click = new ClacuatorClick();// 監聽對象源
close.addActionListener(click);// close按鈕加入到監聽對象源 進行拆箱比較
daidai.addActionListener(click);// daidai按鈕加入到監聽對象源
haiyang.addActionListener(click);// haiyang按鈕加入到監聽對象源
kt.addActionListener(click);// kt 按鈕加入到監聽對象源
initButton();// 給電腦按鈕加入前端和後端關系
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
// addbutton
public void initButton() {// 給電腦按鈕加入前端和後端關系
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 5; j++) {
// createImage
if (i == 3 && j == 4) {// 因為”=“号圖示在界面上占據了兩個位置
return;
}
ImageIcon imageIcon = new ImageIcon("image/case03/but" + i + "_" + j + ".png");
JButton btnButton = new JButton(imageIcon);
butsButtons[i][j] = btnButton;
btnButton.setActionCommand(comand[i][j]);
btnButton.setBorderPainted(false);
btnButton.setContentAreaFilled(false);
btnButton.setBounds(j * 50 + 15, 190 + i * 38, imageIcon.getIconWidth(), imageIcon.getIconHeight());
// 添加事件
btnButton.addActionListener(click);// btnButton按鈕加入到監聽對象源
label.add(btnButton);
}
}
}
// 監聽類
class ClacuatorClick implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
// getActionCommand擷取到辨別此事件指令的字元串
String commandString = e.getActionCommand();
// System.out.println(e.getActionCommand());
if (commandString.equals("+") || commandString.equals("-") || commandString.equals("*")
|| commandString.equals("/")) {
operaString = commandString;
labelr.setText(operaString.toString());
} else if (commandString.equals("c")) {// 清除
n1 = 0;
n2 = 0;
operaString = "";
number1 = new StringBuilder();
number2 = new StringBuilder();
labelr.setText("0");
} else if (commandString.equals("=")) {
if (!operaString.equals("")) {
if (!number1.toString().equals("")) {
n1 = Double.parseDouble(number1.toString());
}
if (!number2.toString().equals("")) {
n2 = Double.parseDouble(number2.toString());
}
if (operaString.equals("+")) {
result = n1 + n2;
} else if (operaString.equals("-")) {
result = n1 - n2;
} else if (operaString.equals("*")) {
result = n1 * n2;
} else if (operaString.equals("/")) {
result = n1 / n2;
}
n2 = 0;
n1 = result;
operaString = "";
number1 = new StringBuilder();
number2 = new StringBuilder();
labelr.setText(result + "");
}
} else if (commandString.equals("退出")) {
System.exit(0);
} else {
if (operaString.equals("")) {
if (commandString.equals(".")) {
if (!number1.toString().contains(".")) {
number1.append(".");
}
} else {
number1.append(commandString);
}
labelr.setText(number1.toString());
} else {
if (commandString.equals(".")) {
if (!number2.toString().contains(".")) {
number2.append(".");
}
} else {
number2.append(commandString);
}
labelr.setText(number2.toString());
}
}
if (e.getSource() == daidai) {// getSource()傳回最初發生 Event 的對象。//産生換主題效果
label.setIcon(new ImageIcon("image/case03/daidai/back.png"));
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 5; j++) {
if (i == 3 && j == 4) {
return;
}
ImageIcon icon = new ImageIcon("image/case03/daidai/but" + i + "_" + j + ".png");
butsButtons[i][j].setIcon(icon);// butsButtons[i][j]前面已經綁定了其他效果屬性，這裡隻要換一下外表
}
}
}
if (e.getSource() == haiyang) { 産生換主題效果
label.setIcon(new ImageIcon("image/case03/haiyang/back.png"));
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 5; j++) {
if (i == 3 && j == 4) {
return;
}
ImageIcon icon = new ImageIcon("image/case03/haiyang/but" + i + "_" + j + ".png");
butsButtons[i][j].setIcon(icon);
}
}
}
if (e.getSource() == kt) { 産生換主題效果
label.setIcon(new ImageIcon("image/case03/back.png"));
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 5; j++) {
if (i == 3 && j == 4) {
return;
}
ImageIcon icon = new ImageIcon("image/case03/but" + i + "_" + j + ".png");
butsButtons[i][j].setIcon(icon);
}
}
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
new Calculator();
}
}
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