Main.java Source code

Introduction

Here is the source code for Main.java

Source

import static javax.swing.SpringLayout.EAST;
import static javax.swing.SpringLayout.SOUTH;
import static javax.swing.SpringLayout.WIDTH;

import java.awt.Color;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Spring;
import javax.swing.SpringLayout;
import javax.swing.SwingConstants;
import javax.swing.WindowConstants;

public class Main {
    public static void main(String[] args) {
        SpringLayout layout = new SpringLayout();
        JPanel p = new JPanel(layout);
        p.setBorder(BorderFactory.createLineBorder(Color.GREEN, 10));

        JLabel l1 = new JLabel("label: width=90%", SwingConstants.CENTER);
        l1.setBorder(BorderFactory.createLineBorder(Color.RED, 1));
        JButton l2 = new JButton("button: width=50%");

        Spring panelw = layout.getConstraint(WIDTH, p);

        SpringLayout.Constraints c1 = layout.getConstraints(l1);
        c1.setX(Spring.constant(0));
        c1.setY(Spring.constant(20));
        c1.setWidth(Spring.scale(panelw, 0.9f));
        p.add(l1);

        SpringLayout.Constraints c2 = layout.getConstraints(l2);
        c2.setWidth(Spring.scale(panelw, 0.5f));
        layout.putConstraint(SOUTH, l2, -20, SOUTH, p);
        layout.putConstraint(EAST, l2, -20, EAST, p);
        p.add(l2);

        JFrame f = new JFrame();
        f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        f.getContentPane().add(p);
        f.setSize(320, 240);
        f.setVisible(true);
    }
}