java swing check box

// java Program to create a simple checkbox using JCheckBox 
import java.awt.event.*; 
import java.awt.*; 
import javax.swing.*; 
class solve extends JFrame { 
  
    // frame 
    static JFrame f; 
  
    // main class 
    public static void main(String[] args) 
    { 
        // create a new frame 
        f = new JFrame("frame"); 
  
        // set layout of frame 
        f.setLayout(new FlowLayout()); 
  
        // create checkbox 
        JCheckBox c1 = new JCheckBox("checkbox 1"); 
        JCheckBox c2 = new JCheckBox("checkbox 2"); 
  
        // create a new panel 
        JPanel p = new JPanel(); 
  
        // add checkbox to panel 
        p.add(c1); 
        p.add(c2); 
  
        // add panel to frame 
        f.add(p); 
  
        // set the size of frame 
        f.setSize(300, 300); 
  
        f.show(); 
    } 
}