好的，我有一个我正在上课的课程。我必须从文本字段中获取输入，将广告投入到重载的构造函数中，该构造函数将字符串作为参数。我还有一些与构造函数有关的事情，所以在我的代码中你会看到一些不在这个问题之外的东西。另外，我没有发布我的方法，因为它是家庭作业的重要组成部分，而且一切正常，（在我尝试将信息传递给构造函数之前）。我想知道的是我有一种方法可以将文本字段信息传递给构造函数，因为我现在已经在这里工作了几个小时，但是很明显我不会这样做。明白这一点。如果你只是想把我带到某个地方，我可以学习如何做到这一点我会很感激。
代码：
package lab4;
import java.awt.*;
import java.awt.List;
import javax.swing.*;
import java.awt.event.*;
import java.lang.Iterable.*;
import java.util.*;
public class Lab4 extends JFrame{
private JTextField jTextField1;
private JButton doSome;
private JLabel ansTxt;
private JLabel asciSum;
private JLabel jLabel1;
private JLabel jLabel3;
private JLabel jLabel4;
private JLabel jLabel5;
private JLabel jLabel6;
private JLabel lowCnt;
private JLabel numDigit;
private JLabel upCnt;
private JLabel vowelCnt;
private String userInput = jTextField1.getText();
public Lab4()
{
initComponents();
}
public Lab4(String x)
{
this.userInput = x;
}
public Lab4(char[] x)
{
}
public Lab4(byte[] x)
{
}
private void initComponents() {
jTextField1 = new JTextField();
jLabel1 = new JLabel();
doSome = new JButton();
ansTxt = new JLabel();
jLabel3 = new JLabel();
jLabel4 = new JLabel();
jLabel5 = new JLabel();
jLabel6 = new JLabel();
asciSum = new JLabel();
vowelCnt = new JLabel();
numDigit = new JLabel();
upCnt = new JLabel();
lowCnt = new JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setAutoRequestFocus(false);
setFont(new java.awt.Font("Comic Sans MS", 1, 12)); // NOI18N
jLabel1.setText("Enter a string Here and I'll show you some info about it!");
doSome.setToolTipText("This Will Do Something");
doSome.setInheritsPopupMenu(true);
doSome.setLabel("Click Me When Your Done!");
doSome.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
doSomeActionPerformed(evt);
}
});
ansTxt.setText("ASCII SUM:");
jLabel3.setText("Number of Vowels:");
jLabel4.setText("Number of Digits:");
jLabel5.setText("Number Of Uppercase:");
jLabel6.setText("Number Of Lowercase:");
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING, false)
.addComponent(ansTxt)
.addComponent(jLabel5, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel4, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel3, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel6, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(84, 84, 84)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(lowCnt)
.addComponent(vowelCnt)
.addComponent(asciSum)
.addComponent(numDigit)
.addComponent(upCnt)))
.addGroup(layout.createSequentialGroup()
.addGap(95, 95, 95)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField1)
.addComponent(jLabel1, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(doSome, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
.addContainerGap(239, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(34, 34, 34)
.addComponent(jLabel1)
.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField1, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(doSome)
.addGap(34, 34, 34)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(ansTxt)
.addComponent(asciSum))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(vowelCnt))
.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4)
.addComponent(numDigit))
.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(upCnt))
.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(jLabel6)
.addComponent(lowCnt))
.addContainerGap(157, Short.MAX_VALUE))
);
pack();
}
private void doSomeActionPerformed(ActionEvent evt)
{
String takeTfIn = this.jTextField1.getText();
this.asciSum.setText(getAsciiSum(takeTfIn));
this.vowelCnt.setText(getNumVowels(takeTfIn));
this.numDigit.setText(getNumDigits(takeTfIn));
this.upCnt.setText(getNumUpperCase(takeTfIn));
this.lowCnt.setText(getNumLowerCase(takeTfIn));
}
// Excluded methods go here...
public static void main(String[] args)
{
Lab4 test = new Lab4();
test.setVisible(true);
}
}
答案 0 :(得分：0)
填写tex字段值并单击“提交”后，您需要创建lab4的新实例。点击提交，你可以这样做
this.setVisible(false);//Hide current instance
Lab4 test = new Lab4(this.jTextField1.getText()); // create new instance
test.setVisible(true); // set new instance visible
不要忘记添加以下构造函数：
public Lab4 (String value)
{
this.jTextField1.setText(value); // if you like to set value back to textbox
}