When using a list in Java, java.awt.List comes out and an error occurs
In Java programming, I used the list as usual, but sometimes I get the following error:
This is because I'm using java.awt.List instead of java.util.List as the list.
What is java.awt.List?
It is a GUI part of Abstract Windows Toolkit used when creating GUI in Java, so-called ** list box **. Not a list of Java collections.
screen
Source
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.List;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class AwtEx {
AwtEx(){
List awtList = new List();
awtList.add("item01");
awtList.add("item02");
awtList.add("item03");
Frame frame = new Frame();
frame.add(awtList);
frame.setSize(200, 200);
frame.setLayout(new FlowLayout());
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
frame.dispose();
}
});
}
public static void main(String[] args) {
new AwtEx();
}
}
How to respond
You can avoid using java.awt, but I think it will be easier if you set it in the development environment so that java.awt does not appear as shown in the link below.