无法导入 JFrame 或 Dimension

Question

I already have the system library in my package and have tried resetting the metadata. What else can I do?

Errors with comments stating what errors they are.

package JFrameTest;

import java.awt.Dimension; //The package java.awt is not accessible
import javax.swing.JFrame; //The type javax.swing.JFrame is not accessible

public class Empty extends JFrame { //JFrame cannot be resolved to a type

    public static void main (String[] args) {
        new Main().setVisible(true);  // Main cannot be resolved to a type
}

Answer 1

JavaFX was deleted from JDK, so you need to download JavaFX from here , here or use this guide. If you use maven just add the dependencies.