Question

单击按钮时如何获取输入字段的值？

例如，我需要textName类的PersonalInfo输入值，以便在另一个名为GenerateRDF的类中使用

这是我的代码：

public class PersonalInfo extends JPanel {
    private void initialize() {
        ....
        JTextPane textName = new JTextPane();
        textName.setBounds(95, 36, 302, 20);
        panel.add(textName);

        JButton btnSave = new JButton("Save");
        btnSave.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                // send the value of `textName` to GenerateRDF
               GenerateRDF generator = new GenerateRDF();
               generator.setRDF();
            }
        }); 
   }
}

public class GenerateRDF {
      public void setRDF() {
        String personURI    = "http://localhost/amitkumar";
        String fullName = textName;

        // print here the value received from the `PersonalInfo` class
        System.out.println(fullName);
        Model model = ModelFactory.createDefaultModel();

        Resource node = model.createResource(personURI)
                 .addProperty(VCARD.FN, fullName);
        model.write(System.out);
    }
}

Answer 1

您可以使用按钮actionListener中的getText()方法在单击变量时将输入存储在变量中。然后将此变量传递给GenerateRDF类

Answer 2

单击按钮时如何获取输入字段的值？

存在一种名为 getText() 的方法，可让您检索textName变量的文本。

示例：

JButton btnSave = new JButton("Save"); btnSave.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { // send the value of `textName` to GenerateRDF String getName = textName.getText(); // retrieve the value // do something with it } });

Answer 3

JtextPane有一个方法你必须调用getText方法

  public void actionPerformed(ActionEvent arg0) {
                // send the value of `textName` to GenerateRDF
        String input =  texName.getText();
  }

Answer 4

您可以这样做：

public class PersonalInfo extends JPanel {
private void initialize() {
    ....
    JTextPane textName = new JTextPane();
    textName.setBounds(95, 36, 302, 20);
    panel.add(textName);

    JButton btnSave = new JButton("Save");
    btnSave.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            // send the value of `textName` to GenerateRDF
           GenerateRDF generator = new GenerateRDF();
           generator.setRDF(textName.getText());
        }
    }); 
  }
}

public class GenerateRDF {
  public void setRDF(String fullName) {
    String personURI    = "http://localhost/amitkumar";

    // print here the value received from the `PersonalInfo` class
    System.out.println(fullName);
    Model model = ModelFactory.createDefaultModel();

    Resource node = model.createResource(personURI)
             .addProperty(VCARD.FN, fullName);
    model.write(System.out);
  }
}

Java在click事件上返回输入文本值

4 个答案: