下面是一个包含以下建议的示例:
-
充满鳗鱼的气垫船 - 按平台设置位置。
-
Aardvocate Akintayo Olu - 序列化位置。
但继续添加2个调整:
- 同时序列化宽度/高度。
- 如果帧在关闭时最大化,则会在获取边界之前恢复帧。(我讨厌序列化选项但没有考虑到这一点的应用程序。用户坐在那里点击“最大化/恢复”按钮,想知道为什么什么都没有发生!)
4分组合提供最佳的用户体验!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Properties;
import java.io.*;
class RestoreMe {
/** This will end up in the current directory
A more sensible location is a sub-directory of user.home.
(left as an exercise for the reader) */
public static final String fileName = "options.prop";
/** Store location & size of UI */
public static void storeOptions(Frame f) throws Exception {
File file = new File(fileName);
Properties p = new Properties();
// restore the frame from 'full screen' first!
f.setExtendedState(Frame.NORMAL);
Rectangle r = f.getBounds();
int x = (int)r.getX();
int y = (int)r.getY();
int w = (int)r.getWidth();
int h = (int)r.getHeight();
p.setProperty("x", "" + x);
p.setProperty("y", "" + y);
p.setProperty("w", "" + w);
p.setProperty("h", "" + h);
BufferedWriter br = new BufferedWriter(new FileWriter(file));
p.store(br, "Properties of the user frame");
}
/** Restore location & size of UI */
public static void restoreOptions(Frame f) throws IOException {
File file = new File(fileName);
Properties p = new Properties();
BufferedReader br = new BufferedReader(new FileReader(file));
p.load(br);
int x = Integer.parseInt(p.getProperty("x"));
int y = Integer.parseInt(p.getProperty("y"));
int w = Integer.parseInt(p.getProperty("w"));
int h = Integer.parseInt(p.getProperty("h"));
Rectangle r = new Rectangle(x,y,w,h);
f.setBounds(r);
}
public static void main(String[] args) {
final JFrame f = new JFrame("Good Location & Size");
f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
f.addWindowListener( new WindowAdapter() {
public void windowClosing(WindowEvent we) {
try {
storeOptions(f);
} catch(Exception e) {
e.printStackTrace();
}
System.exit(0);
}
});
JTextArea ta = new JTextArea(20,50);
f.add(ta);
f.pack();
File optionsFile = new File(fileName);
if (optionsFile.exists()) {
try {
restoreOptions(f);
} catch(IOException ioe) {
ioe.printStackTrace();
}
} else {
f.setLocationByPlatform(true);
}
f.setVisible(true);
}
}