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Toolkit  tk=Toolkit.getDefaultToolkit(); 
Dimension  d=tk.getScreenSize(); 
int  screenHeight=d.height; 
int  screenWidth=d.width; 
f.setSize(x,y); 
f.setLocation((screenWidth-x)/2,(screenHeight-y)/2); 
f.show(); 
f.setLocationRelativeTo(null)ÊÔÊÔ Ã»¿´³öÄã´úÂëÓÐʲôÒìÑù°¡ ²»»áÄãµÄ½çÃæµÄ³¤¿íºÍÆÁÄ»´óС»ù±¾Ò»Ñù°É¡£

setLocationRelativeTo(null);

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Java code:

//µ÷ÕûÏÔʾλÖÃ
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension tempSize = testframe.getSize();
if (tempSize.height > screenSize.height)
{
tempSize.height = screenSize.height;
}
if (tempSize.width > screenSize.width)
{
tempSize.width = screenSize.width;
}
testframe.setLocation((screenSize.width - tempSize.width) / 2, (screenSize.height - tempSize.height) / 2);
testframe.show();



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java JTextField Îı¾×´Ì¬¼àÌý - Java / Java SE

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