Java 80. Cách sử dụng JPanel và cấu hình Look and Feel cho giao diện chương trình Java

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Video giải thích chi tiết

https://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html

 Code chi tiết 

     package view;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.nio.ByteOrder;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;

public class MyCalculator extends JFrame {
	public MyCalculator() {
		this.setTitle("My Calculator");

		this.setSize(300, 300);

		this.setLocationRelativeTo(null);

		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JTextField jTextField = new JTextField(50);
		JPanel jPanel_head = new JPanel();
		jPanel_head.setLayout(new BorderLayout());
		jPanel_head.add(jTextField, BorderLayout.CENTER);

		JButton jButton_0 = new JButton("0");
		JButton jButton_1 = new JButton("1");
		JButton jButton_2 = new JButton("2");
		JButton jButton_3 = new JButton("3");
		JButton jButton_4 = new JButton("4");
		JButton jButton_5 = new JButton("5");
		JButton jButton_6 = new JButton("6");
		JButton jButton_7 = new JButton("7");
		JButton jButton_8 = new JButton("8");
		JButton jButton_9 = new JButton("9");
		JButton jButton_cong = new JButton("+");
		JButton jButton_tru = new JButton("-");
		JButton jButton_nhan = new JButton("*");
		JButton jButton_chia = new JButton("/");
		JButton jButton_bang = new JButton("=");
		JPanel jPanel_buttons = new JPanel();
		jPanel_buttons.setLayout(new GridLayout(5, 3));
		jPanel_buttons.add(jButton_0);
		jPanel_buttons.add(jButton_1);
		jPanel_buttons.add(jButton_2);
		jPanel_buttons.add(jButton_3);
		jPanel_buttons.add(jButton_4);
		jPanel_buttons.add(jButton_5);
		jPanel_buttons.add(jButton_6);
		jPanel_buttons.add(jButton_7);
		jPanel_buttons.add(jButton_8);
		jPanel_buttons.add(jButton_9);
		jPanel_buttons.add(jButton_cong);
		jPanel_buttons.add(jButton_tru);
		jPanel_buttons.add(jButton_nhan);
		jPanel_buttons.add(jButton_chia);
		jPanel_buttons.add(jButton_bang);

		this.setLayout(new BorderLayout());
		this.add(jPanel_head, BorderLayout.NORTH);
		this.add(jPanel_buttons, BorderLayout.CENTER);

		this.setVisible(true);
	}

	public static void main(String[] args) {
		try {
//			com.sun.java.swing.plaf.gtk.GTKLookAndFeel
//			com.sun.java.swing.plaf.motif.MotifLookAndFeel
//			com.sun.java.swing.plaf.windows.WindowsLookAndFeel

//			UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
//			UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
//			UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
			new MyCalculator();
		} catch (Exception ex) {
			ex.printStackTrace();
		}	
	}
}