JFrame最大化屏幕尺寸与尺寸

Question

我能想到的是我没有正确设置屏幕尺寸。日志显示高度和宽度看起来正确。从Swing trail：

package net.bounceme.dur.nntp.swing; 

import java.awt.Dimension; 
import java.awt.Toolkit; 
import java.util.logging.Logger; 
import javax.swing.*; 
import java.awt.*; 

public class HelloWorldSwing { 

    private static final Logger LOG = Logger.getLogger(HelloWorldSwing.class.getName()); 

    private static void createAndShowGUI() { 
     //Create and set up the window. 
     JFrame frame = new JFrame("HelloWorldSwing"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 


     // Container c = frame.getContentPane(); 
//  frame.getContentPane(); 
     // c.setBackground(Color.YELLOW); 
     // adjust to need. 
     Dimension d = new Dimension(400, 40); 
     //c.setPreferredSize(d); 

     //Add the ubiquitous "Hello World" label. 
     JLabel label = new JLabel("Hello World"); 
     frame.getContentPane().add(label); 

     Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 
     int height = screenSize.height - 50; 
     int width = screenSize.width - 50; 
     frame.setSize(height, width); 
     frame.setSize(d); 
     LOG.info(height + "\t\t\t" + width); 
     //Display the window. 
     frame.pack(); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
     //Schedule a job for the event-dispatching thread: 
     //creating and showing this application's GUI. 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 

      public void run() { 
       createAndShowGUI(); 
      } 
     }); 
    } 
} 

强制性法律的样板：

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* 
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* modification, are permitted provided that the following conditions 
* are met: 
* 
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*  notice, this list of conditions and the following disclaimer. 
* 
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*  contributors may be used to endorse or promote products derived 
*  from this software without specific prior written permission. 
* 
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
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*/ 

/** 
* This example, like all Swing examples, exists in a package: 
* in this case, the "start" package. 
* If you are using an IDE, such as NetBeans, this should work 
* seamlessly. If you are compiling and running the examples 
* from the command-line, this may be confusing if you aren't 
* used to using named packages. In most cases, 
* the quick and dirty solution is to delete or comment out 
* the "package" line from all the source files and the code 
* should work as expected. For an explanation of how to 
* use the Swing examples as-is from the command line, see 
* http://docs.oracle.com/javase/javatutorials/tutorial/uiswing/start/compile.html#package 
*/ 

截图：

Answer 1

尝试删除frame.pack();。这给出了扩大的框架。这是因为pack（）导致框架为re-sized。

Answer 2

你应该在你的代码注释此行：

//frame.setSize(d); 

而且删除此行：

//frame.pack(); 

Answer 3

1. Toolkit.getDefaultToolkit().getScreenSize()没有考虑到像任务的事情任何额外的插图/ dock bar
2. 你打电话给JFrame#pack，它将把帧的大小调整为其内容的首选大小

您应该使用JFrame#setExtendedState(JFrame.MAXIMIZED_BOTH)

Answer 4

取出pack()电话。并尝试将所有三种方法设置为setSize(),setPrefferredSize()和setMaximumSize()具有相同的维度。

Answer 5

只是要注意那些刚刚发现这一点，

frame.setSize(height, width);

是倒退，它应该是：

frame.setSize(width, height);

否则，当你运行程序，你会很快注意到（除非你有一个方形的屏幕），你的JFrame将不会覆盖屏幕右侧的一部分。

此外，删除代码，看看JFrame中企图占据了屏幕的大部分，这部分（我得到一个28" 最我的屏幕监视与上面的代码（不frame.pack()）：

frame.setSize(d);

上面的代码段正在改变你的JFrame到宽度400，高度40在尺寸d中定义。

Answer 6

尝试这一个，

this.setExtendedState(MAXIMIZED_BOTH);