如何在borderlayout北区放置两个Jpanels/Jbutton?

但是，我希望在北段有两个jpanel，这样它就可以使4个行"变为像这样:|---------------button--------------| //north|---------------button2-------------| //north----------------center--------------- //center|---------------button3-------------| //south我尝试仅按如下方式添加它:pnl.add(jbtn1, BorderLayout.NORTH);pnl.add(jbtn2, BorderLayout.NORTH);但是这里发生的是第二个按钮替换了第一个按钮:|---------------button2-------------| //north----------------center--------------- //center|---------------button3-------------| //south如何在北面布局区域获得两行?很抱歉，如果这个问题很糟糕，我是新手.预先感谢.解决方案当您将GUI视为JFrame且具有定义该GUI所需的JPanels的JFrame时，创建一个更复杂的GUI很简单. >这是您要查找的GUI.我为JFrame的每个部分(NORTH，CENTER和SOUTH)创建了一个JPanel.每个JPanels使用一个BorderLayout，以便在扩展GUI时，NORTH和SOUTH按钮保持相同的高度.这是完整的可运行示例代码.import java.awt.BorderLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.SwingUtilities;public class BorderLayoutDemo implements Runnable { public static void main(String[] args) { SwingUtilities.invokeLater(new BorderLayoutDemo()); } @Override public void run() { JFrame fj = new JFrame("Demonstration of Border Layout"); fj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); fj.add(createNorthPanel(), BorderLayout.NORTH); fj.add(createCenterPanel(), BorderLayout.CENTER); fj.add(createSouthPanel(), BorderLayout.SOUTH); fj.pack(); fj.setLocationByPlatform(true); fj.setVisible(true); } private JPanel createNorthPanel() { JPanel panel = new JPanel(new BorderLayout()); JButton button1 = new JButton("North Button"); panel.add(button1, BorderLayout.NORTH); JButton button2 = new JButton("North Button 2"); panel.add(button2, BorderLayout.SOUTH); return panel; } private JPanel createCenterPanel() { JPanel panel = new JPanel(new BorderLayout()); JButton button = new JButton("Center Button"); panel.add(button, BorderLayout.CENTER); return panel; } private JPanel createSouthPanel() { JPanel panel = new JPanel(new BorderLayout()); JButton button = new JButton("South Button"); panel.add(button, BorderLayout.SOUTH); return panel; }}How do I display two JPanels in the 'North' in borderlayout?Here's and example code that outputs a GUI with three distinct rows, Top, Middle, Bottom. There's one button covering the first row, 3 buttons covering the second row, and one covering the bottom row.package borderLayoutDemo;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import java.awt.BorderLayout;public class BorderLayoutDemo { public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); JFrame fj = new JFrame("Demonstration of Border Layout"); fj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton jbtn1 = new JButton("UP"); JButton jbtn2 = new JButton("DOWN"); JButton jbtn3 = new JButton("LEFT"); JButton jbtn4 = new JButton("RIGHT"); JButton jbtn5 = new JButton("MIDDLE"); JPanel pnl = new JPanel(); pnl.setLayout(new BorderLayout()); pnl.add(jbtn1, BorderLayout.NORTH); pnl.add(jbtn2, BorderLayout.SOUTH); pnl.add(jbtn3, BorderLayout.WEST); pnl.add(jbtn4, BorderLayout.EAST); pnl.add(jbtn5, BorderLayout.CENTER); fj.add(pnl); fj.pack(); fj.setVisible(true); }}Output of above code:output of above codeHowever, I'd like there to be two jpanels in the North section so it'd make 4 "rows" like this:|---------------button--------------| //north|---------------button2-------------| //north----------------center--------------- //center|---------------button3-------------| //southI've tried simply just adding it as follows:pnl.add(jbtn1, BorderLayout.NORTH);pnl.add(jbtn2, BorderLayout.NORTH);But what happens here is the second button just replaces the first one:|---------------button2-------------| //north----------------center--------------- //center|---------------button3-------------| //southHow would I get two rows in the north layout area?Sorry if this question sucks, I'm new to this stuff. Thanks in advance. 解决方案 Creating a more complex GUI is straightforward when you think of a GUI as a JFrame with as many JPanels as necessary to define the GUI.Here's the GUI you were looking for.I created a JPanel for each section of the JFrame (NORTH, CENTER, and SOUTH). Each of those JPanels used a BorderLayout so that when you expand the GUI, the NORTH and SOUTH buttons stay the same height.Here's the complete runnable example code.import java.awt.BorderLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.SwingUtilities;public class BorderLayoutDemo implements Runnable { public static void main(String[] args) { SwingUtilities.invokeLater(new BorderLayoutDemo()); } @Override public void run() { JFrame fj = new JFrame("Demonstration of Border Layout"); fj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); fj.add(createNorthPanel(), BorderLayout.NORTH); fj.add(createCenterPanel(), BorderLayout.CENTER); fj.add(createSouthPanel(), BorderLayout.SOUTH); fj.pack(); fj.setLocationByPlatform(true); fj.setVisible(true); } private JPanel createNorthPanel() { JPanel panel = new JPanel(new BorderLayout()); JButton button1 = new JButton("North Button"); panel.add(button1, BorderLayout.NORTH); JButton button2 = new JButton("North Button 2"); panel.add(button2, BorderLayout.SOUTH); return panel; } private JPanel createCenterPanel() { JPanel panel = new JPanel(new BorderLayout()); JButton button = new JButton("Center Button"); panel.add(button, BorderLayout.CENTER); return panel; } private JPanel createSouthPanel() { JPanel panel = new JPanel(new BorderLayout()); JButton button = new JButton("South Button"); panel.add(button, BorderLayout.SOUTH); return panel; }} 这篇关于如何在borderlayout北区放置两个Jpanels/Jbutton?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！