JAVA setVisible不会隐藏组件
我试图隐藏除从jcomboBox的索引（cbLists）中获得的1以外的所有jList，它并没有真正隐藏它像禁用而不是隐藏的jList，我需要它隐藏所有像完全不可见的1这是我正在尝试的代码：
package javaapplication2;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Form1 extends javax.swing.JFrame {
public Form1() {
initComponents();
ActionListener actionListener = (ActionEvent e) -> {
System.out.println("Selected: " + cbLists.getSelectedItem());
System.out.println(", Position: " + cbLists.getSelectedIndex());
setCB(cbLists.getSelectedIndex());
};
cbLists.addActionListener(actionListener);
}
private void setCB(int index) {
switch (index) {
case 1:
jList1.setVisible(false);
jList4.setVisible(false);
jList3.setVisible(false);
jList2.setVisible(true);
break;
case 2:
jList1.setVisible(false);
jList2.setVisible(false);
jList3.setVisible(true);
jList4.setVisible(false);
break;
case 3:
jList1.setVisible(false);
jList2.setVisible(false);
jList3.setVisible(false);
jList4.setVisible(true);
break;
default:
jList1.setVisible(true);
jList2.setVisible(false);
jList3.setVisible(false);
jList4.setVisible(false);
break;
}
}
/**
* 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")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
cbLists = new javax.swing.JComboBox<>();
jScrollPane1 = new javax.swing.JScrollPane();
jList1 = new javax.swing.JList<>();
jScrollPane2 = new javax.swing.JScrollPane();
jList2 = new javax.swing.JList<>();
jScrollPane3 = new javax.swing.JScrollPane();
jList3 = new javax.swing.JList<>();
jScrollPane4 = new javax.swing.JScrollPane();
jList4 = new javax.swing.JList<>();
cbLists.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "jList1", "jList2", "jList3", "jList4" }));
jList1.setModel(new javax.swing.AbstractListModel<String>() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public String getElementAt(int i) { return strings[i]; }
});
jScrollPane1.setViewportView(jList1);
jList2.setModel(new javax.swing.AbstractListModel<String>() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public String getElementAt(int i) { return strings[i]; }
});
jScrollPane2.setViewportView(jList2);
jList3.setModel(new javax.swing.AbstractListModel<String>() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public String getElementAt(int i) { return strings[i]; }
});
jScrollPane3.setViewportView(jList3);
jList4.setModel(new javax.swing.AbstractListModel<String>() {
String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
public int getSize() { return strings.length; }
public String getElementAt(int i) { return strings[i]; }
});
jScrollPane4.setViewportView(jList4);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 248, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(cbLists, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(622, Short.MAX_VALUE))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(25, 25, 25)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 248, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(612, Short.MAX_VALUE)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(35, 35, 35)
.addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 248, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(602, Short.MAX_VALUE)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(45, 45, 45)
.addComponent(jScrollPane4, javax.swing.GroupLayout.PREFERRED_SIZE, 248, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(592, Short.MAX_VALUE)))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 266, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(cbLists, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(143, 143, 143))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(26, 26, 26)
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 266, Short.MAX_VALUE)
.addGap(168, 168, 168)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(36, 36, 36)
.addComponent(jScrollPane3, javax.swing.GroupLayout.DEFAULT_SIZE, 266, Short.MAX_VALUE)
.addGap(158, 158, 158)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(46, 46, 46)
.addComponent(jScrollPane4, javax.swing.GroupLayout.DEFAULT_SIZE, 266, Short.MAX_VALUE)
.addGap(148, 148, 148)))
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Form1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
/* Create and display the form */
java.awt.EventQueue.invokeLater(() -> {
new Form1().setVisible(true);
});
}
// Variables declaration - do not modify
private javax.swing.JComboBox<String> cbLists;
private javax.swing.JList<String> jList1;
private javax.swing.JList<String> jList2;
private javax.swing.JList<String> jList3;
private javax.swing.JList<String> jList4;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JScrollPane jScrollPane4;
// End of variables declaration
}
正如您在图像中看到的那样，选择了jList2，它位于jList1的后面，我需要它位于前面，而其余部分不可见，这很奇怪。
我认为您想隐藏jScrollPane1-jScrollPane4。因此，您看到的灰色框是JScrollPanes。它们没有被禁用，它们只是空的，因为您已经在其中隐藏了白名单。您必须隐藏整个窗格。
您可以根据需要改进代码...例如，您可以创建滚动面板列表
private List<JScrollPane> scrollPaneList = new ArrayList<>();
并将您的窗格添加到列表中
this.scrollPaneList.addAll(Arrays.asList(jScrollPane1, jScrollPane2, jScrollPane3, jScrollPane4));
然后你可以做这样的事
private void setCB(int index)
{
for (int i = 0; i < scrollPaneList.size(); i++)
{
scrollPaneList.get(i).setVisible(index == i);
}
}