无法找到为什么布局变小 [英] Cant find why the layout is getting smaller
本文介绍了无法找到为什么布局变小的处理方法，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
这是我拥有的几乎可以正常工作的代码.在进入问题之前，请先查看代码，请原谅我的冗长代码，但这可以像Java类一样粘贴，我使用NETBEANS JForm设计器来获取GUI.
This is the code I have that is working almost as expected. Before I go in to the problem please see the code, pardon me for the long code but this can be pasted like a java class, I used the NETBEANS JForm designer to get the GUI.
package test;
import java.awt.event.*;
import javax.swing.*;
/**
*
* @author jackandjill
*/
public class Summingup extends JFrame {
/**
* Creates new form Summingup
*/
public Summingup() {
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.
*/
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
input1_tb = new javax.swing.JTextField();
calculate_btn = new javax.swing.JButton();
result_lbl = new javax.swing.JLabel();
input2_tb = new javax.swing.JTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("Input 1");
jLabel2.setText("Input 2");
calculate_btn.setText("SUM");
calculate_btn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
calculate_btnActionPerformed(evt);
}
});
result_lbl.setText("RESULT DISPLAYED HERE!");
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(18, 18, 18)
.addComponent(input1_tb))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel2)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(result_lbl))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(input2_tb)))))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(calculate_btn)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(1, 1, 1)
.addComponent(calculate_btn, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(input1_tb, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(input2_tb, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 20, Short.MAX_VALUE)
.addComponent(result_lbl)
.addContainerGap())
);
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()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void calculate_btnActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
InvalidValueException ive = new InvalidValueException();
calculate_btn.addActionListener(ive);
//addActionListener
}
/**
* @param args the command line arguments
*/
public static void main(String args[])
{
/*
* Set the Nimbus look and feel
*/
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/*
* If Nimbus (introduced in Java SE 6) is not available, stay with the
* default look and feel. For details see
* http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
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 ex) {
java.util.logging.Logger.getLogger(Summingup.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Summingup.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Summingup.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Summingup.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable()
{
public void run()
{
new Summingup().setVisible(true);
}
});
}
// Variables declaration - do not modify
public javax.swing.JButton calculate_btn;
public javax.swing.JTextField input1_tb;
public javax.swing.JTextField input2_tb;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
public javax.swing.JPanel jPanel1;
public javax.swing.JLabel result_lbl;
// End of variables declaration
class InvalidValueException implements ActionListener
{
public void actionPerformed(ActionEvent ae)
{
try
{
if(ae.getSource() == calculate_btn)
{
String input_1 = input1_tb.getText();
String input_2 = input2_tb.getText();
checkBlankInput(input_1,input_2);
validateInput(Integer.parseInt(input_1),Integer.parseInt(input_2));
result_lbl.setText(calculate(Integer.parseInt(input_1),Integer.parseInt(input_2)));
}
}
catch (NumberFormatException excep)
{
result_lbl.setText("Invalid number");
}
catch (BlankInputException excep)
{
result_lbl.setText(excep.getMessage());
}
catch (InvalidInputException excep)
{
result_lbl.setText(excep.getMessage());
}
}
public void checkBlankInput(String input1,String input2) throws BlankInputException
{
if (input1.length() == 0 ||input2.length() == 0) throw new BlankInputException();
}
public void validateInput(int input1 , int input2) throws InvalidInputException
{
if (input1 + input2 > 100 )
throw new InvalidInputException();
}
public String calculate(int input1, int input2)
{
String res = "";
while (true)
{
res = Integer.toString(input1 + input2);
break;
}
return res;
}
}
}
class InvalidInputException extends Exception {
public InvalidInputException() {
super("Invalid number");
}
}
class BlankInputException extends Exception {
public BlankInputException() {
super("Input cannot be blank");
}
}
因此，让我简要介绍一下代码，该代码基本上是初始化GUI并进行大量异常处理，对于您而言，完整地阅读代码以使您更清楚地理解准确的答案确实很重要. 这是我执行程序时得到的布局
So let me be brief about the code, This code is basically initializing a GUI and doing lot of exception handling, it is indeed important that you see the whole code so that you understand more clearly to answer precisely. This is the layout I get when I execute the program
因此，在我按下SUM按钮一次时间
So after I press the SUM button ONE time
仍然与上面相同的图像不变
still the same image as above no changes
我再次按下SUM按钮.第二次
I press the SUM button again. for the second time
所以希望您看到了！文本字段的长度越来越短，这是怎么回事?甚至不知道从哪里开始，如果您要问我进行调试，我已经做过，但是仍然不做任何减小尺寸的事情吗?
So hope you saw that! the textfields are getting shorter in length whats happening? Dont even know where to start from, if you are going to ask me to do debugging, I already did but still it doesnot do any size reduction whats going on?
推荐答案
文本字段的长度越来越短，因为result_lbl标签中的文本随着单击按钮的更改而变得越来越短.您会注意到，文本字段的长度始终与下面的标签的长度相同.
The textfields are getting shorter in length because the text in your result_lbl label is getting shorter as it changes when the button is clicked. You'll notice that the length of the textfields is always the same as the length of the label below.
要解决此问题，只需构造具有指定列数的文本字段即可，例如
To fix it just construct the textfields with a specified number of columns, like e.g.
input1_tb = new JTextField(20);
因此，无论下面的标签发生什么变化，文本字段的长度都不会受到影响.
So whatever happens to the label below, the length of the textfields should not be affected.
why doesn't the button listener is not kicking in the first time?
删除此
calculate_btn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
calculate_btnActionPerformed(evt);
}
});
还有这个
private void calculate_btnActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
InvalidValueException ive = new InvalidValueException();
calculate_btn.addActionListener(ive);
//addActionListener
}
并将其替换为此行:
calculate_btn.addActionListener(new InvalidValueException());
创建按钮后
这篇关于无法找到为什么布局变小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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