Main.java:1: error: class Test is public, should be declared in a file named Test.java
public class Test extends JFrame {
^
Main.java:1: error: cannot find symbol
public class Test extends JFrame {
^
symbol: class JFrame
Main.java:11: error: cannot find symbol
public void paint(Graphics g) {
^
symbol: class Graphics
location: class Test
Main.java:4: error: cannot find symbol
this.setPreferredSize(new Dimension(400, 400));
^
symbol: class Dimension
location: class Test
Main.java:5: error: cannot find symbol
this.pack();
^
symbol: method pack()
Main.java:6: error: cannot find symbol
this.setVisible(true);
^
symbol: method setVisible(boolean)
Main.java:7: error: cannot find symbol
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
^
symbol: variable EXIT_ON_CLOSE
location: class Test
Main.java:10: error: method does not override or implement a method from a supertype
@Override
^
Main.java:12: error: cannot find symbol
super.paint(g);
^
symbol: variable super
location: class Test
9 errors