如我所读,调整GridLayout和GrigBagLayout内部组件的大小确实很难。就我而言,我有一个带有2列2行的GridBagLayout。在第一行中,有2个标签,在第二行中,有2个扩展JTable的组件(类型Tablero
)。
我的问题是,我不能让这两个JTable填充JFrame直到其底部。我已经尝试过setSize(), setPreferredSize(), setBounds()
...,但是它们根本不起作用。我也尝试通过constraints.fill = GridBagConstraints.VERTICAL/SOUTH/CENTER
来做...但是我什么也没得到。
我也尝试过在JFrame中设置JPanel的大小,但是它不起作用...
这是我的代码:
public static void main(String[] args)
{
JFrame pantalla = new JFrame();
pantalla.getContentPane().setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
JLabel tab1Label = new JLabel("Tablero 1");
JLabel tab2Label = new JLabel("Tablero 2");
Tablero tablero1 = new Tablero();
Tablero tablero2 = new Tablero();
tablero1.setPreferredSize(new Dimension(400,400));
tablero1.setBounds(0, 0, 400, 400);
tablero1.setBorder(new LineBorder(Color.gray, 2));
constraints.gridx = 0;
constraints.gridy = 0;
constraints.gridwidth = 1;
constraints.gridheight = 1;
constraints.insets = new Insets(0, 0, 20, 0);
pantalla.getContentPane().add(tab1Label, constraints);
constraints.gridx = 1;
constraints.gridy = 0;
constraints.gridwidth = 1;
constraints.gridheight = 1;
constraints.insets = new Insets(0, 0, 20, 0);
pantalla.getContentPane().add(tab2Label, constraints);
constraints.insets = new Insets(0, 0, 0, 0);
constraints.fill = GridBagConstraints.VERTICAL;
constraints.gridx = 0;
constraints.gridy = 1;
constraints.gridwidth = 1;
constraints.gridheight = 1;
pantalla.getContentPane().add(tablero1, constraints);
constraints.fill = GridBagConstraints.VERTICAL;
constraints.gridx = 1;
constraints.gridy = 1;
constraints.gridwidth = 1;
constraints.gridheight = 1;
pantalla.getContentPane().add(tablero2, constraints);
pantalla.pack();
pantalla.setSize(800, 400);
pantalla.setVisible(true);
pantalla.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
结果如下:
我知道还有其他更容易实现的方法,但是使用GridBagLayout实际上是一项必要条件。
最佳答案
尝试将constraints.weightx = 1;
和constraints.weighty = 1;
添加到JTables约束中。
还要删除这些行:
tablero1.setPreferredSize(new Dimension(400,400));
tablero1.setBounds(0, 0, 400, 400);
关于java - 如何在GridBagLayout中设置组件的大小,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/28635448/