너구리의 IT일기

package ch01; class MyThread extends Thread{ @Override public void run() { for (int i = 0; i < 20; i++) { System.out.println(i + " : " + Thread.currentThread()); } } } public class MyThreadEx3 { public static void main(String[] args) { //문제 1 쓰레드 3개 생성 //쓰레드 start() 호출 MyThread thread1 = new MyThread(); MyThread thread2 = new MyThread(); MyThread thread3 = new MyThread(); thread1.start(); thread..

package ch01; //쓰레드: 작업자 class MyThreadEx2 extends Thread{ String name; public MyThreadEx2(String name) { this.name = name; } @Override public void run() { int i; for (i = 0; i < 10; i++) { System.out.println(name + " : " + i + "\t"); try { Thread.sleep(200); } catch (InterruptedException e) { e.printStackTrace(); } }//다운받는과정이라는 과정 }//런메서드로 위임하게된 작업자 } public class ThreadTest2 { public static vo..

package ch01; public class ThreadTest1 { //메인 쓰레드(작업자, 작업자의 단위) public static void main(String[] args) { for (int i = 0; i < 30; i++) { System.out.print("-"); try { Thread.sleep(200); } catch (Exception e) { } } } }

package ch05; import java.awt.Graphics; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.JFrame; import javax.swing.JPanel; class MyFrame9 extends JFrame implements KeyListener { BufferedImage backgroundImage; BufferedImage imageIcon; MyImagePan..

package ch05; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JFrame; import javax.swing.JTextArea; class MyFrame8 extends JFrame implements KeyListener { // 1. keyAdapter 내부클래스로 정의해서 만들어주세요 private JTextArea area; public MyFrame8() { initData(); setInitLa..

package ch05; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JFrame; import javax.swing.JTextArea; class MyFrame7 extends JFrame implements KeyListener{ private JTextArea area; public MyFrame7() { initData(); setInitLayout(); addEventListener(); } private void initData() { setTitle("키이벤트연습"); setSize(500,500); setDefaultCloseOperation(EXIT_ON_CLOSE); area =..

package ch05; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JFrame; class MyFrame6 extends JFrame{ public MyFrame6() { initData(); setInitLayout() ; addEventListener(); } private void initData() { setTitle("어댑터 클래스 이용 방법"); setSize(500,500 ); setDefaultCloseOperation(EXIT_ON_CLOSE); } private void setInitLayout() { setVisible(true); } private void addEv..

package ch05; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JFrame; import javax.swing.JLabel; //class MyFrame5 extends JFrame implements MouseListener{ class MyFrame5 extends JFrame { // 클릭을 하거나 들어오거나 나갓을떄 동작하는 이벤트 // 안드로이드나 웹에서도 많이 사용 JLabel label; public ..

package ch05; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; class MyFrame4 extends JFrame{ JButton button; public MyFrame4() { initData(); setInitLayout(); addEventListener(); } private void initData() { //초기화작업 null 포인트가 뜬다면 이닛에서 확인 setTitle("익명구현객체사용 연습"); setSize(500, 500); setDefault..

package ch05; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; class ColorChangeFrame extends JFrame implements ActionListener{ BorderLayout borderLayout; JPanel panel1; JPanel panel2;..