英文:
The method getText() is undifined for the type Button
问题
我正在尝试在Eclipse IDE中创建一个简单的计算器，并在设置按钮的动作时遇到了这个问题。
Button btn7 = new Button("7");
btn7.setFont(new Font("Arial", Font.BOLD, 18));
btn7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String EnterNumber = btn7.getText();
txtDisplay.setText(EnterNumber);
}
});
我在第5行遇到问题，它显示'方法getText()在button类型中未定义'。
英文:
I am trying to create the simple calculator in eclipse ide and at the time to set the action to the buttons I m facing this problem
Button btn7 = new Button("7");
btn7.setFont(new Font("Arial", Font.BOLD, 18));
btn7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String EnterNumber = btn7.getText();
txtDisplay.setText(EnterNumber);
}
});
I am facing problem in line no. 5, it is showing their that 'The method getText() is undefined for the type button'
答案1
得分: 1
Button 不要与 JButton 混淆。您可能在寻找 getLabel()？
String EnterNumber = btn7.getLabel();
https://docs.oracle.com/javase/7/docs/api/java/awt/Button.html#getLabel()
JButton 继承了一个叫做 getText() 的方法，也许您把这两种类型的按钮弄混了？
https://docs.oracle.com/javase/7/docs/api/javax/swing/JButton.html
英文:
Button not to be confused with JButton. You might be looking for getLabel()?
String EnterNumber = btn7.getLabel();
https://docs.oracle.com/javase/7/docs/api/java/awt/Button.html#getLabel()
JButton inherits a method called getText(), perhaps you have confused the two types of buttons? https://docs.oracle.com/javase/7/docs/api/javax/swing/JButton.html
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