Java 在JFrame标签中调用方法

我在计算机科学课上有一个项目，我正在尝试使用JFrame，但遇到了一些问题。

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我试图实现的第一个目标是让用户在第一个JFrame.java类中输入一个“字符名”，并能够将该字符名引入另一个JFrame.java类

java是捕获用户字符名的类。 java是我想要显示字符名的类

在WelcomeScreen.java中，我从Swing控件和

//This is the WelcomeScreen.java text field I edited so that what the user inputs turns into a string.
class WelcomeScreen extends JFrame {
private void characterNameActionPerformed(java.awt.event.ActionEvent evt) {                                              
       //String charName is declared in the beginning
        charName = characterName.getText().trim();

        dndRacesAndClasses newUser = new dndRacesAndClasses(charName);

        characterName.add(charName, this);

        // TODO add your handling code here:
    }

//This is the textbox the user types in their character name

private void characterNameActionPerformed(java.awt.event.ActionEvent evt) {                                              

        charName = characterName.getText().trim();

        dndRacesAndClasses newUser = new dndRacesAndClasses(charName);

        newUser.charName(charName);

        // TODO add your handling code here:
    }
    //I added this get/set methods because this works in object-oriented coding to bring something over to a different class.                                        
    public String getCharName()
    {
        characterName.setText(charName);
        return charName;
    }
    public void setCharName(String charName){
        characterName.setText(charName);
    }
}

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“进入第一个JFrame.java类”为了避免混淆，您应该使用文件的实际名称。如何创建WelcomeScreen和CharSum的实例？如何显示它们？”//这是WelcomeScreen.java“与其用文字来描述，不如做

class WelcomeScreen{…}

。同样的

CharSum

。我按照之前的评论进行了编辑。如果您修复了缩进并修复了任何其他问题，这将有所帮助。例如，

CharSum

有一些应该在方法中的代码。有关创建好的代码示例的更多提示，请参阅。getter正在设置值，它应该只返回变量的值

//This is CharSum.java (I used a label in this class because it seemed like the only thing that would be capable of printing information that the user cannot edit on this screen)
class CharSum extends JFrame {
charSum = new javax.swing.JLabel();  //charSum is the label name

WelcomeScreen newUser = new WelcomeScreen();

//using the set method in WelcomeScreen.java to set character name
newUser.setCharName(charSum.toString());

//setting text for label to character name
charSum.setText(newUser.getCharName());
}