Java by API/javax.swing/Spring

Spring: constant(int min, int pref, int max)

import java.awt.Container;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.Spring;
import javax.swing.SpringLayout;
public class MainClass {
   
  public static void main(String[] args) {
    JFrame aWindow = new JFrame("This is a Spring Layout");
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    aWindow.setSize(500,500);
    SpringLayout layout = new SpringLayout();      
    Container content = aWindow.getContentPane();  
    content.setLayout(layout);                     
    JButton[] buttons = new JButton[6];            
    SpringLayout.Constraints constr = null;
    for(int i = 0; i < buttons.length; i++) {
      buttons[i] = new JButton("Press " + (i+1));
      content.add(buttons[i]);                     
   }
    Spring xSpring = Spring.constant(5,15,25);    
    Spring ySpring = Spring.constant(10,30, 50);  
    constr = layout.getConstraints(buttons[0]);
    constr.setX(xSpring); 
    constr.setY(ySpring); 

    for(int i = 1 ; i< buttons.length ; i++) {
      constr = layout.getConstraints(buttons[i]);
      layout.putConstraint(SpringLayout.WEST, buttons[i],
                             xSpring,SpringLayout.EAST, buttons[i-1]);    
      layout.putConstraint(SpringLayout.NORTH, buttons[i],
                             ySpring,SpringLayout.SOUTH, buttons[i-1]);
    }
    aWindow.setVisible(true);                      // Display the window
  }
}