for loop gets error “illegal start of type”

Question

so im trying to create a program in java which will create a 10 by 10 matrix, with each element displaying either a 1 or a 0 randomly. Here is what i have so far:

Answer 1

You need to place your code in a code block such as a method or constructor rather than the class block of an inner class

/**
 * TODO: Refactor later NOT to extend from JFrame
 */
class MyFrame extends JFrame {

    void initComponents() {
        GridLayout setLayout = new GridLayout(10, 10);

        for (int i = 0; i < 10; i++) {
          ...
        }
    }
    ...
}

Answer 2

You can't have arbitrary statements inside a class definition. Perhaps you want to put it in the constructor?

class Random {
    public Random() {
        GridLayout setLayout = new GridLayout(10, 10);

        for (int i = 0; i < 10; i++)
        {
           int number = (int) (Math.random() * 2);
           String str = Integer.toString(number);
           setLayout.add(new JLabel(str, JLabel.CENTER));
        }
    }
}

Or, you could just create another method and place it in there.