java.awt.Insets四个参数的方位顺序

java.awt.Insets四个参数的方位顺序

       //  设定布局
         int  gridx, gridy, gridwidth, gridheight, anchor, fill, ipadx, ipady;
         double  weightx, weighty;
        GridBagConstraints c;
        Insets inset;
        GridBagLayout gridbag  =   new  GridBagLayout();
         this .setLayout(gridbag);
        
         //  0,0
        gridx  =   0 ;
        gridy  =   0 ;
        gridwidth  =   1 ;
        gridheight  =   1 ;
        weightx  =   1.00 ;
        weighty  =   1.00 ;
        anchor  =  GridBagConstraints.CENTER;
        fill  =  GridBagConstraints.BOTH;
        inset  =   new  Insets(up, left, down, right);
        ipadx  =   0 ;
        ipady  =   0 ;
        c  =   new  GridBagConstraints(gridx, gridy, gridwidth, gridheight,
                weightx, weighty, anchor, fill, inset, ipadx, ipady);
        JScrollPane js = new  JScrollPane(msgArea);
        gridbag.setConstraints(js, c);
         this .add(js);

        以上代码中，Insets构造函数四个参数的顺序依次为上，左，下，右， 逆时针方向。这样比较好记忆。
        Swing中其它类似的四参数形式（如BorderFactory.createEmptyBorder(top, left, down, right)）也类同此例。