在网格布局中，通过使用Java中的setBounds（），Jbutton的大小不会改变

Question

While making a frame using GridLayout the button size is not changing using setBound(). The code for the frame is :

f1=new JFrame("Select any one");
            ch=new JCheckBox("SUBSTITUTION CYPHER");
            ch1=new JCheckBox("two");
            ch2=new JCheckBox("three");
            ch3=new JCheckBox("four");
            ch4=new JCheckBox("five");

            f1.add(ch);
            f1.add(ch1);
            f1.add(ch2);
            f1.add(ch3);
            f1.add(ch4);
            f1.setLayout(new GridLayout(5, 1));
            b10.addActionListener(this);
            b10.setBounds(280,380,10,10);
            f1.add(b10);
            f1.setSize(300,400);
            f1.setVisible(true);

Answer 1

According to docs of setBounds

This method changes layout-related information, and therefore, invalidates the component hierarchy.

So, setBounds sets the size and position with layout specific. At your JFrame you set GridLayout , where setBounds will not work.

Answer 2

GridLayout isn't the best choice for buttons as GridLayout will take up all space in its container. So no setBounds() won't be the best choice for what you're trying to achieve.

I would suggest having a look at this reference for LayoutManagers: Reference for LayoutManagers

I would suggest looking at some alternative LayoutManagers. You could try GridBagLayout.

Answer 3

如果您真的想使用GridLayout还可以先将JPanel添加到每个网格，然后将较小的JButton添加到JPanel 。