使用GUI時出現錯誤：IllegalStateException
[英]Errors when using GUI: IllegalStateException
問題描述
即使在Net Bean中制作程序時，我也沒有錯誤，但嘗試運行程序時仍會出錯。 只有當我嘗試編譯時，才會彈出50個錯誤。 有人解釋說我的JTextField未附加到Horizontal組，我以為我已修復它，但似乎沒有。
public class TrianglePerimeter extends javax.swing.JFrame {
public TrianglePerimeter() {
utilizeComponents();
}
@SuppressWarnings("Not Checked")
private void utilizeComponents() {
sideOneInput = new javax.swing.JTextField();
sideTwoInput = new javax.swing.JTextField();
sideThreeInput = new javax.swing.JTextField();
sideOneLabel = new javax.swing.JLabel();
sideTwoLabel = new javax.swing.JLabel();
sideThreeLabel = new javax.swing.JLabel();
findPerimeterButton = new javax.swing.JButton();
perimeterLabel = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Perimeter of a Triangle");
findPerimeterButton.setText("Find the Perimeter");
findPerimeterButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
findPerimeterButtonActionPerformed(evt);
}
}
);
sideOneLabel.setText("Side One");
sideTwoLabel.setText("Side Two");
sideThreeLabel.setText("Side Three");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(29, 29, 29)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(findPerimeterButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(sideOneInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(sideTwoInput)
.addComponent(sideThreeInput)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(16, 16, 16)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(sideOneLabel, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(sideTwoLabel, javax.swing.GroupLayout.Alignment.TRAILING)))
.addGroup(layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(sideThreeLabel)))
.addGap(56, 56, 56)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(perimeterLabel)))))
.addContainerGap(67, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(sideOneInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(sideOneLabel))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(sideTwoInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(sideTwoLabel))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(sideThreeInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(sideThreeLabel))
.addGap(18, 18, 18)
.addComponent(findPerimeterButton)
.addContainerGap(27, Short.MAX_VALUE)
));
pack();
}
private void findPerimeterButtonActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(evt);
try {
double tempPerimeter = (Double.parseDouble(sideOneInput.getText())) + (Double.parseDouble(sideTwoInput.getText())) + (Double.parseDouble(sideThreeInput.getText()));
perimeterLabel.setText(tempPerimeter + " is the perimeter");
} catch (NumberFormatException e) {
System.err.println("NumberFormatException: " + e.getMessage());
}
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(() -> {
new TrianglePerimeter().setVisible(true);
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JLabel sideOneLabel;
private javax.swing.JLabel sideTwoLabel;
private javax.swing.JLabel sideThreeLabel;
private javax.swing.JButton findPerimeterButton;
private javax.swing.JLabel perimeterLabel;
private javax.swing.JTextField sideOneInput;
private javax.swing.JTextField sideTwoInput;
private javax.swing.JTextField sideThreeInput;
private javax.swing.JTextField tempTextField;
// End of variables declaration//GEN-END:variables
}
這些是錯誤
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: javax.swing.JTextField[,0,0,0x0,invalid,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@3566d06c,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=0,columnWidth=0,command=,horizontalAlignment=LEADING] is not attached to a horizontal group
at javax.swing.GroupLayout.checkComponents(GroupLayout.java:1086)
at javax.swing.GroupLayout.prepare(GroupLayout.java:1040)
at javax.swing.GroupLayout.preferredLayoutSize(GroupLayout.java:878)
at java.awt.Container.preferredSize(Container.java:1799)
at java.awt.Container.getPreferredSize(Container.java:1783)
at javax.swing.JComponent.getPreferredSize(JComponent.java:1664)
at javax.swing.JRootPane$RootLayout.preferredLayoutSize(JRootPane.java:920)
at java.awt.Container.preferredSize(Container.java:1799)
at java.awt.Container.getPreferredSize(Container.java:1783)
at javax.swing.JComponent.getPreferredSize(JComponent.java:1664)
at java.awt.BorderLayout.preferredLayoutSize(BorderLayout.java:719)
at java.awt.Container.preferredSize(Container.java:1799)
at java.awt.Container.getPreferredSize(Container.java:1783)
at java.awt.Window.pack(Window.java:809)
at TrianglePerimeter.TrianglePerimeter.utilizeComponents(TrianglePerimeter.java:96)
at TrianglePerimeter.TrianglePerimeter.<init>(TrianglePerimeter.java:16)
at TrianglePerimeter.TrianglePerimeter.lambda$main$0(TrianglePerimeter.java:111)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
誰能告訴我我要去哪里錯了？
1 個解決方案
解決方案1
0 2018-11-16 02:39:48
Yo Briana，
我沒有足夠的時間來修復所有問題，但是您的兩個最大問題是不將perimeterLabel組件添加到垂直組中，並從並行組開始每個布局。 如果您從oracle閱讀有關組布局的教程，您會注意到每個布局都以SequentialGroup而不是並行組開始。 這是因為在引用並行元素之前，需要定義布局中元素的順序。 類似於2d數組首先聲明其包含的數組數，然后說明每個數組中的元素的方式。
無論如何，我沒有添加邊界標簽，以便您可以查看答案並嘗試解決應如何定位的問題。 我還消除了所有差距（但在此處留下了注釋的代碼，以便您閱讀）。 如果您將自動間隔設置為true則將為您處理尺寸調整，它將自動響應。
隨時提出問題。 我認為這應該是解決問題的一個好開始。
public class TrianglePerimeter extends javax.swing.JFrame {
public TrianglePerimeter() {
utilizeComponents();
}
@SuppressWarnings("Not Checked")
private void utilizeComponents() {
sideOneInput = new javax.swing.JTextField();
sideTwoInput = new javax.swing.JTextField();
sideThreeInput = new javax.swing.JTextField();
sideOneLabel = new javax.swing.JLabel();
sideTwoLabel = new javax.swing.JLabel();
sideThreeLabel = new javax.swing.JLabel();
findPerimeterButton = new javax.swing.JButton();
perimeterLabel = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Perimeter of a Triangle");
findPerimeterButton.setText("Find the Perimeter");
findPerimeterButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
findPerimeterButtonActionPerformed(evt);
}
}
);
sideOneLabel.setText("Side One");
sideTwoLabel.setText("Side Two");
sideThreeLabel.setText("Side Three");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setAutoCreateGaps(true);
layout.setAutoCreateContainerGaps(true);
layout.setHorizontalGroup(
layout.createSequentialGroup()
// .addGap(29, 29, 29)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
// .addGap(16, 16, 16)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(sideOneLabel, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(sideTwoLabel, javax.swing.GroupLayout.Alignment.TRAILING)))
.addGroup(layout.createSequentialGroup()
// .addGap(18, 18, 18)
.addComponent(sideThreeLabel)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(sideOneInput)
.addComponent(sideTwoInput)
.addComponent(sideThreeInput))
// .addGap(56, 56, 56)
)
.addComponent(findPerimeterButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
)
// .addContainerGap(67, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createSequentialGroup()
// .addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(sideOneLabel)
.addComponent(sideOneInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
// .addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(sideTwoLabel)
.addComponent(sideTwoInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
// .addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(sideThreeLabel)
.addComponent(sideThreeInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
// .addGap(18, 18, 18)
.addComponent(findPerimeterButton)
// .addContainerGap(27, Short.MAX_VALUE)
);
pack();
}
private void findPerimeterButtonActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(evt);
try {
double tempPerimeter = (Double.parseDouble(sideOneInput.getText())) + (Double.parseDouble(sideTwoInput.getText())) + (Double.parseDouble(sideThreeInput.getText()));
perimeterLabel.setText(tempPerimeter + " is the perimeter");
} catch (NumberFormatException e) {
System.err.println("NumberFormatException: " + e.getMessage());
}
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(() -> {
new TrianglePerimeter().setVisible(true);
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JLabel sideOneLabel;
private javax.swing.JLabel sideTwoLabel;
private javax.swing.JLabel sideThreeLabel;
private javax.swing.JButton findPerimeterButton;
private javax.swing.JLabel perimeterLabel;
private javax.swing.JTextField sideOneInput;
private javax.swing.JTextField sideTwoInput;
private javax.swing.JTextField sideThreeInput;
private javax.swing.JTextField tempTextField;
// End of variables declaration//GEN-END:variables
}
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