使用GUI时出现错误:IllegalStateException [英] Errors when using GUI: IllegalStateException
本文介绍了使用GUI时出现错误:IllegalStateException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
即使在Net Bean中制作程序时，我尝试运行程序时仍会遇到错误，但没有错误.只有当我尝试编译时，才会弹出50个错误.有人解释说我的JTextField没有附加到Horizontal组，我以为我已修复它，但似乎没有.
I keep getting errors when trying to run my program even though when making the program in net beans I have no errors. It's only when I try to compile that 50 errors pop up. Someone explained that my JTextField wasn't attached to the Horizontal group and I thought I fixed it but it seems not.
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
}
这些是错误
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)
谁能告诉我我要去哪里错了?
Can anyone please tell me where I am going wrong?
推荐答案
Yo Briana，
Yo Briana,
我没有足够的时间来修复所有问题，但是您的两个最大问题包括不将perimeterLabel组件添加到垂直组中，并以并行组开始每个布局.如果您阅读了有关oracle组布局的教程，将会注意到，每个布局都以SequentialGroup开头，而不是并行组.这是因为在引用并行元素之前，需要定义布局中元素的顺序.类似于2d数组首先声明其包含的数组数，然后说明每个数组中的元素的方式.
I didn't have enough time to fix everything but your two biggest problems include not adding the perimeterLabel component to the vertical group and starting every layout with parallel groups. If you read the tutorial on group layout from oracle you'll notice that each layout starts with a SequentialGroup instead of a parallel group. That is because you need to define the sequence of elements in a layout before you refer to parallel elements. It is similar to how 2d arrays first state the number of arrays it contains and then the elements in each array.
无论如何，我没有添加边界标签，因此您可以查看答案并尝试解决应如何定位的问题.我还消除了所有差距(但在此处留下了注释的代码，以便您阅读).如果将自动间隔设置为true，将为您处理大小调整，它将自动响应.
Anyway I did not add the perimeter label so that you could look at the answer and try to solve figure out how it should be positioned. I also removed all the gaps (but left your code there commented so that you read it). If you set auto gaps to true the sizing with be handled for you and it will be responsive.
随时提问.我认为这应该是解决问题的一个好开始.
Feel free to ask question. I think this should be a good start to figuring things out.
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
}
这篇关于使用GUI时出现错误:IllegalStateException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IT屋！
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