[Ch14] Updating MiniMusicPlayer3 with the version we want to put in the book (491d8945) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch14/MiniMusicPlayer3.java

+22 −22

Changes for src/main/java/ch14/MiniMusicPlayer3.java: 22 added lines, 22 removed lines.
Original line number	Diff line number	Diff line
		@@ -2,14 +2,14 @@ package ch14;

		import javax.sound.midi.*;
		import javax.swing.*;
		import java.awt.Color;
		import java.awt.Graphics;
		import java.awt.*;
		import java.util.Random;

		import static javax.sound.midi.ShortMessage.*;

		public class MiniMusicPlayer3 {
		private static JFrame f = new JFrame("My First Music Video");
		private static MyDrawPanel ml;
		private MyDrawPanel panel;
		private Random random = new Random();

		public static void main(String[] args) {
		MiniMusicPlayer3 mini = new MiniMusicPlayer3();
		@@ -17,10 +17,11 @@ public class MiniMusicPlayer3 {
		}

		public void setUpGui() {
		ml = new MyDrawPanel();
		f.setContentPane(ml);
		f.setBounds(30, 30, 300, 300);
		f.setVisible(true);
		JFrame frame = new JFrame("My First Music Video");
		panel = new MyDrawPanel();
		frame.setContentPane(panel);
		frame.setBounds(30, 30, 300, 300);
		frame.setVisible(true);
		}

		public void go() {
		@@ -29,17 +30,16 @@ public class MiniMusicPlayer3 {
		try {
		Sequencer sequencer = MidiSystem.getSequencer();
		sequencer.open();
		sequencer.addControllerEventListener(ml, new int[]{127});
		sequencer.addControllerEventListener(panel, new int[]{127});
		Sequence seq = new Sequence(Sequence.PPQ, 4);
		Track track = seq.createTrack();

		int r = 0;
		int note;
		for (int i = 0; i < 60; i += 4) {

		r = (int) ((Math.random() * 50) + 1);
		track.add(makeEvent(NOTE_ON, 1, r, 100, i));
		note = random.nextInt(50) + 1;
		track.add(makeEvent(NOTE_ON, 1, note, 100, i));
		track.add(makeEvent(CONTROL_CHANGE, 1, 127, 0, i));
		track.add(makeEvent(NOTE_OFF, 1, r, 100, i + 2));
		track.add(makeEvent(NOTE_OFF, 1, note, 100, i + 2));
		}

		sequencer.setSequence(seq);
		@@ -73,19 +73,19 @@ public class MiniMusicPlayer3 {

		public void paintComponent(Graphics g) {
		if (msg) {
		int r = (int) (Math.random() * 250);
		int gr = (int) (Math.random() * 250);
		int b = (int) (Math.random() * 250);
		int r = random.nextInt(250);
		int gr = random.nextInt(250);
		int b = random.nextInt(250);

		g.setColor(new Color(r, gr, b));

		int height = (int) ((Math.random() * 120) + 10);
		int width = (int) ((Math.random() * 120) + 10);
		int height = random.nextInt(120) + 10;
		int width = random.nextInt(120) + 10;

		int x = (int) ((Math.random() * 40) + 10);
		int y = (int) ((Math.random() * 40) + 10);
		int xPost = random.nextInt(40) + 10;
		int yPos = random.nextInt(40) + 10;

		g.fillRect(x, y, height, width);
		g.fillRect(xPost, yPos, width, height);
		msg = false;
		}
		}