滾動窗格（其中有textArea）的滾動條在java swing GUI中沒有正確顯示

我創建了一個具有以下序列的Swing框架：JFrame> JPanel> JScrollPane> JTextArea。我正在使用卡片佈局將Janel加載到JFrame中。滾動窗格（其中有textArea）的滾動條在java swing GUI中沒有正確顯示

我的問題是滾動條顯示不正確（如圖所示）。 enter image description here

我的代碼如下：

jTextArea1 = new javax.swing.JTextArea(); 
    jScrollPane1 = new javax.swing.JScrollPane(jTextArea1); 


    jTextArea1.setColumns(15); 
    jTextArea1.setEditable(false); 
    jTextArea1.setFont(new java.awt.Font("SansSerif", 0, 12)); // NOI18N 
    jTextArea1.setRows(3); 

    JScrollBar verticalScrollBar = jScrollPane1.getVerticalScrollBar(); 
    verticalScrollBar.setValue(0); 
    jTextArea1.setCaretPosition(0); 

    jScrollPane1.setPreferredSize(new java.awt.Dimension(632, 425)); 



//Group Layout 
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this); 
    this.setLayout(layout); 
    layout.setHorizontalGroup(layout 
      .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(
        layout.createSequentialGroup() 
          .addGroup(
            layout.createParallelGroup(
              javax.swing.GroupLayout.Alignment.LEADING) 
              .addComponent(
                jPanelBottomPanel, 
                javax.swing.GroupLayout.PREFERRED_SIZE, 
                javax.swing.GroupLayout.DEFAULT_SIZE, 
                javax.swing.GroupLayout.PREFERRED_SIZE) 
              .addComponent(
                jLabelImageLogoSAGUpgradeUtility, 
                javax.swing.GroupLayout.PREFERRED_SIZE, 
                javax.swing.GroupLayout.DEFAULT_SIZE, 
                javax.swing.GroupLayout.PREFERRED_SIZE) 

          ) 
          .addGap(0, 0, Short.MAX_VALUE)) 
      .addGroup(
        layout.createSequentialGroup() 
          .addGroup(
            layout.createParallelGroup(
              javax.swing.GroupLayout.Alignment.LEADING) 
              .addGroup(
                layout.createSequentialGroup() 
                .addContainerGap() 
                .addComponent(jPanelStartInstaller, 
                 javax.swing.GroupLayout.PREFERRED_SIZE, 
                 javax.swing.GroupLayout.PREFERRED_SIZE, 
                 javax.swing.GroupLayout.PREFERRED_SIZE) 
                .addContainerGap() 
                ) 
              .addGroup(
                layout.createSequentialGroup() 
                  .addGap(10, 10, 
                    10) 
                  .addComponent(
                    jCheckBox1) 
                  .addGap(0, 
                    0, 
                    Short.MAX_VALUE)) 
              .addGroup(
                javax.swing.GroupLayout.Alignment.LEADING, 
                layout.createSequentialGroup() 
                  .addContainerGap() 
                  .addGroup(
                    layout.createParallelGroup(
                      javax.swing.GroupLayout.Alignment.LEADING, 
                      false) 
                      .addGroup(
                        layout.createSequentialGroup() 
                          .addGap(0, 
                            0, 
                            0) 
                          .addComponent(
                            jScrollPane1, 
                            javax.swing.GroupLayout.PREFERRED_SIZE, 
                            0, 
                            Short.MAX_VALUE)) 
.addGap(5) 
                      .addComponent(
                        jPanel5, 
                        javax.swing.GroupLayout.PREFERRED_SIZE, 
                        javax.swing.GroupLayout.DEFAULT_SIZE, 
                        javax.swing.GroupLayout.PREFERRED_SIZE)))) 
                        .addContainerGap()) 
    ); 
    layout.setVerticalGroup(layout 
      .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(
        javax.swing.GroupLayout.Alignment.TRAILING, 
        layout.createSequentialGroup() 
          .addComponent(jLabelImageLogoSAGUpgradeUtility, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.DEFAULT_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE) 
          .addGap(8, 8, 8) 
          .addComponent(jPanel5, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.DEFAULT_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE) 
          .addPreferredGap(
            javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
          .addComponent(jScrollPane1, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE) 
          .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 0, Short.MAX_VALUE) 
          .addComponent(jPanelStartInstaller, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE) 
          .addComponent(jCheckBox1) 
          .addComponent(jPanelBottomPanel, 
            javax.swing.GroupLayout.PREFERRED_SIZE, 
            javax.swing.GroupLayout.DEFAULT_SIZE, 
            javax.swing.GroupLayout.PREFERRED_SIZE) 
          ));

來源

2012-05-09 merlachandra

FYI：一個JFileChooser內的滾動條也沒有出現不當，當單擊按鈕時是越來越打開一個JFileChooser ... – merlachandra

我認爲沒有錯與那些滾動條。這只是Nimbus的外觀和感覺滾動條（見例如[這個博客文章與Nimbus圖像]（http://www.thectoblog.com/2010/01/nimbus-look-and-feel.html）） – Robin

謝謝羅賓，如果是Nibus的外觀和感覺，那麼我需要改變我的代碼的外觀和感覺...非常感謝，我爲這個愚蠢的東西嘗試了很多選擇：）... – merlachandra

的評論，

...如果是Nibus的外觀和感覺，然後我需要改變的外觀和感覺我的代碼...

你需要的東西這一點，

UIManager.setLookAndFeel ("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

也看看這個：How to Set the Look and Feel

來源

2012-05-09 14:09:47 COD3BOY

滾動窗格（其中有textArea）的滾動條在java swing GUI中沒有正確顯示

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