BorderLayout.CENTER 内的 JScrollPane 不调整大小
这是下面的代码，问题是 JScrollPane 保持其首选大小，并且不随 BorderLayout.CENTER 区域调整大小。当然，我希望它填充该区域......并使用它来滚动其中表格的内容。
frame = new JFrame();
frame.setBounds(100, 100, 500, 400);
JPanel panelCenter = new JPanel();
FlowLayout flowLayout = (FlowLayout) panelCenter.getLayout();
flowLayout.setAlignment(FlowLayout.LEFT);
panelCenter.setPreferredSize(new Dimension(300, 400));
panelRight = new ActorDrawer();
frame.getContentPane().add(panelRight, BorderLayout.EAST);
panelRight.setLayout(null);
panelRight.setPreferredSize(new Dimension(200, 400));
frame.getContentPane().add(panelCenter, BorderLayout.CENTER);
table = new JTable(new MyTableModel());
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JScrollPane scrollPane = new JScrollPane(table);
table.setFillsViewportHeight(true);
panelCenter.add(scrollPane);
This is the code below, the problem is that the JScrollPane stays at its preferred size and doesn't resize with the BorderLayout.CENTER region. I want it to fill that region, of course.. and use it to scroll the contents of the table inside it.
frame = new JFrame();
frame.setBounds(100, 100, 500, 400);
JPanel panelCenter = new JPanel();
FlowLayout flowLayout = (FlowLayout) panelCenter.getLayout();
flowLayout.setAlignment(FlowLayout.LEFT);
panelCenter.setPreferredSize(new Dimension(300, 400));
panelRight = new ActorDrawer();
frame.getContentPane().add(panelRight, BorderLayout.EAST);
panelRight.setLayout(null);
panelRight.setPreferredSize(new Dimension(200, 400));
frame.getContentPane().add(panelCenter, BorderLayout.CENTER);
table = new JTable(new MyTableModel());
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JScrollPane scrollPane = new JScrollPane(table);
table.setFillsViewportHeight(true);
panelCenter.add(scrollPane);
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您不需要使用
BorderLayout将JScrollPane添加到面板的中心：您可以使用FlowLayout将其添加到另一个面板，并且该面板被添加到中心。删除panelCenter。You don't add the
JScrollPaneto the center of the panel with theBorderLayout: you add it to another panel, with aFlowLayout, and this panel is added to the center. Remove thepanelCenter.