public class UIHelper {
// 设置窗口居中显示
public static void setCenter(Component comp) {
Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension screenSize = toolkit.getScreenSize();
int x = (screenSize.width - (int) comp.getPreferredSize().getWidth()) / 2;
int y = (screenSize.height - (int) comp.getPreferredSize().getHeight()) / 2;
comp.setLocation(x, y);
}
/*设置窗口最大化,窗口对象是JFrame*/
public static void setWinMax(JFrame frame)
{
frame.setExtendedState(javax.swing.JFrame.MAXIMIZED_BOTH);
}
/*设置窗口最大化,当窗口对象为JPanel*/
public static void setMaxSize(JPanel panel) {
GraphicsEnvironment graphicsEnvironment=GraphicsEnvironment.getLocalGraphicsEnvironment();
//get maximum window bounds
Rectangle maximumWindowBounds=graphicsEnvironment.getMaximumWindowBounds();
Dimension activeSize = new Dimension(maximumWindowBounds.width,maximumWindowBounds.height);
panel.setPreferredSize(activeSize);
}
/*校验界面输入值是否为空 */
public static boolean isEmpty(String inputValue){
if(inputValue ==null || "".equals(inputValue.trim()))
return true;
else
return false;
}
/*让java gui 界面使用前操作系统的界面风格,让java界面不再丑陋^_^*/
public static void setUILookAndFeel() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
Logger.getLogger(SysUtil.class.getName()).log(Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
Logger.getLogger(SysUtil.class.getName()).log(Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
Logger.getLogger(SysUtil.class.getName()).log(Level.SEVERE, null, ex);
} catch (UnsupportedLookAndFeelException ex) {
Logger.getLogger(SysUtil.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
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