摆动布局 – 使用多个JEditorPanes滚动的中心面板

我无法让Swing布局做我想做的事。 我希望包含两个JEditorPanes的Center面板在包含相等（固定）高度的’n’窗格时滚动。
我一直在Netbean的UI设计师中玩，试图让它工作
jPanel3是中心面板
jEditorPane4和5是一些示例编辑器窗格（这些将保留注释）

public class GBugForm1 extends javax.swing.JFrame { public static void main(String[] args) { GBugForm1 form; form = new GBugForm1(); form.setDefaultCloseOperation(javax.swing.JDialog.DISPOSE_ON_CLOSE); form.setSize(500,500); form.setVisible(true); } /** * Creates new form GBugForm */ public GBugForm1() { initComponents(); } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") //  private void initComponents() { jPanel1 = new javax.swing.JPanel(); jPanel3 = new javax.swing.JPanel(); jScrollPane6 = new javax.swing.JScrollPane(); jEditorPane4 = new javax.swing.JEditorPane(); jScrollPane4 = new javax.swing.JScrollPane(); jEditorPane5 = new javax.swing.JEditorPane(); jPanel4 = new javax.swing.JPanel(); jPanel2 = new javax.swing.JPanel(); setPreferredSize(new java.awt.Dimension(500, 460)); setLayout(new java.awt.BorderLayout()); jPanel1.setLayout(new java.awt.BorderLayout()); jPanel3.setLayout(new javax.swing.BoxLayout(jPanel3, javax.swing.BoxLayout.PAGE_AXIS)); jEditorPane4.setPreferredSize(new java.awt.Dimension(106, 200)); jScrollPane6.setViewportView(jEditorPane4); jPanel3.add(jScrollPane6); jScrollPane4.setViewportView(jEditorPane5); jPanel3.add(jScrollPane4); jPanel1.add(jPanel3, java.awt.BorderLayout.CENTER); jPanel4.setPreferredSize(new java.awt.Dimension(492, 105)); javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4); jPanel4.setLayout(jPanel4Layout); jPanel4Layout.setHorizontalGroup( jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 500, Short.MAX_VALUE) ); jPanel4Layout.setVerticalGroup( jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 105, Short.MAX_VALUE) ); jPanel1.add(jPanel4, java.awt.BorderLayout.PAGE_START); add(jPanel1, java.awt.BorderLayout.CENTER); jPanel2.setPreferredSize(new java.awt.Dimension(400, 40)); javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2); jPanel2.setLayout(jPanel2Layout); jPanel2Layout.setHorizontalGroup( jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 500, Short.MAX_VALUE) ); jPanel2Layout.setVerticalGroup( jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGap(0, 40, Short.MAX_VALUE) ); add(jPanel2, java.awt.BorderLayout.SOUTH); }//  // Variables declaration - do not modify private javax.swing.JEditorPane jEditorPane4; private javax.swing.JEditorPane jEditorPane5; private javax.swing.JPanel jPanel1; private javax.swing.JPanel jPanel2; private javax.swing.JPanel jPanel3; private javax.swing.JPanel jPanel4; private javax.swing.JScrollPane jScrollPane4; private javax.swing.JScrollPane jScrollPane6; // End of variables declaration } 

Answer 1

这是一个可以指导您进一步努力的sscce 。 指定每个面板的首选大小以强制显示滚动条; 类似地，设置框架的整体大小（在pack() ）以强制显示外滚动条。 有关更多信息，请参阅此问答 。 另请注意使用符合RFC 2606的 URL。

顺便说一句，你应该在依赖GUI编辑器之前研究布局 。

 import java.awt.Dimension; import java.awt.EventQueue; import java.awt.GridLayout; import java.io.IOException; import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; /** * @see https://stackoverflow.com/a/12827643/230513 * @see https://stackoverflow.com/questions/4755524 */ public class HtmlView extends JPanel { private static final String EXAMPLE = "http://www.example.com"; private final JEditorPane jep; public HtmlView(String url) { super(new GridLayout(1, 1)); jep = new JEditorPane(); try { jep.setPage(EXAMPLE); } catch (IOException ioe) { ioe.printStackTrace(System.err); } jep.setEditable(false); this.add(new JScrollPane(jep)); } @Override public Dimension getPreferredSize() { return new Dimension(600, 200); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(new GridLayout(0, 1)); panel.add(new HtmlView(EXAMPLE)); panel.add(new HtmlView(EXAMPLE)); panel.add(new HtmlView(EXAMPLE)); f.add(new JScrollPane(panel)); f.pack(); f.setSize(640, 480); f.setVisible(true); } }); } }