Question

我正在为学校做一个项目，我需要将数据从文本框传输到标签＆＃39;数据＆＃39;？我该怎么办？这是我的代码，这个项目的工作是在该课程的前一个实验室完成的，因此听众下的代码不适用于本实验。我只需要帮助＆＃34; EDlistener＆＃34;。我尝试了但是得到了＆＃34; java：89：错误：无法接受的陈述＆＃34;，请回答我的想法，我只是一个初学者。感谢。

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class panelFinal extends JPanel
{

private JLabel label2;
private JLabel labelData, labelMean,   LabelStan;  //field
private JTextField box; //field
private JCheckBox click;
private int dataNumber;
private String dataStr[] = new String [50];
private int data1[] = new int [50];
private int data2[] = new int [51];
private String dataString;




public panelFinal()
{
  setLayout (null);

  JButton EnterData = new JButton ("Enter Data");
  EnterData.addActionListener (new EDListener());
  EnterData.setBounds(10,10,100,40);
  add(EnterData);

  JButton Statistics = new JButton ("Statistics");
  Statistics.addActionListener (new SListener ());
  Statistics.setBounds(120,10,100,40);
  add(Statistics);

  JButton Graphdata = new JButton ("Graph data");
  Graphdata.addActionListener (new GListener ());
  Graphdata.setBounds(230,10,100,40);
  add(Graphdata);

  JButton quit = new JButton ("Quit");
  quit.addActionListener (new quitListener ());
  quit.setBounds(340,10,100,40);
  add(quit);

  box = new JTextField ("", 60);
  box.setHorizontalAlignment (SwingConstants.LEFT);
  box.setBounds(10,55,450,22);
  add(box);

  labelData = new JLabel ("Data:");
  labelData.setHorizontalAlignment (SwingConstants.LEFT);
  labelData.setForeground(Color.blue);
  labelData.setFont(new Font("Serif", Font.BOLD, 20));
  labelData.setBounds(10,80,200,20);
  add(labelData);

  labelMean = new JLabel ("Mean:");
  labelMean.setHorizontalAlignment (SwingConstants.LEFT);
  labelMean.setForeground(Color.blue);
  labelMean.setFont(new Font("Serif", Font.BOLD, 20));
  labelMean.setBounds(10,115,200,20);
  add(labelMean);

  LabelStan = new JLabel ("Standard Deviation:");
  LabelStan.setHorizontalAlignment (SwingConstants.LEFT);
  LabelStan.setForeground(Color.blue);
  LabelStan.setFont(new Font("Serif", Font.BOLD, 20));
  LabelStan.setBounds(10,145,200,20);
  add(LabelStan);








}
private class EDListener implements ActionListener
{
  public void actionPerformed (ActionEvent e)
  {
     String test;
     test = box.getText();

     if ( test.equals("") ); 
     return;

    String dataString = "Data:";
     dataStr = box.getText().split("\\a");
     dataNumber = dataStr.length;


     for (int i=0; i<=dataNumber-1; i++)
     {
        data1[i] = Integer.parseInt(dataStr[i]);

        if (data1[i] < 50)
           data1[i] = 50;

        dataString =  dataString + dataStr[i];
        if (i != dataNumber-1)
           dataString = dataString + ", ";
     }
     labelData.setText(dataString);
     repaint();

  }
}

Answer 1

您可以在文本字段上使用getText（）方法将文本作为字符串使用，并在标签上使用setText（String）来设置它。

如何将数据从文本框传输到JavaScript中的标签

1 个答案: