II Java :30 12:00 I. I IV II. III. IV. ( a d) V. : this==null, T == N A ActionListener C class D actionperformed G getsource I implements K

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1 II Java :30 12:00 I. I IV II. III. IV. ( a d) V. : this==null, T == N A ActionListener C class D actionperformed G getsource I implements K KeyListener J JApplet L addmouselistener M MouseListener N null P public Q equals R Runnable S System.out.println T this V private W new X extends Tree.java, MouseTest.java ( I), BubbleSort1.java, BubbleSort2.java, Point.java, ColorPoint.java 1

2 I (quote of the day) (i) (ii) : Qotd.java import java.net.*; import java.io.*; public class Qotd { static final String[] quotes = { "Gravitation is not responsible for people falling in love." + " -- Albert Einstein", "The best way to predict the future is to invent it. -- Alan Key", "In mathematics, you don t understand things." + " You just get used to them. -- John von Neumann", " -- " ; public static void main(string args[]) { try { (i) servsock = new ServerSocket( (ii) ); while(true){ Socket sock = servsock.accept(); PrintStream out = new PrintStream(sock.getOutputStream()); long now = System.currentTimeMillis(); // int len = quotes.length; out.println(quotes[(int)(now%len)]); // sock.close() ; catch (Exception e){ System.exit(1) ; ( ) : TCP RO.java ( ) A A.1.1 import java.net.*; import java.io.*; public class TCP_RO { public static void main(string[] argv) { try { Socket readsocket = new Socket(argv[0], Integer.parseInt(argv[1])); InputStream instrm = readsocket.getinputstream(); while(true) { int c = instrm.read(); if (c==-1) break; System.out.write(c); catch (Exception e) { e.printstacktrace(); System.exit(1); 2

3 IP java Qotd java TCP_RO ( ) The best way to predict the future is to invent it. -- Alan Key 3

4 II. Java ( ) Windows Ctrl-C ************ *** *********************** ArrayList (i) 2 : CharGraph.java import java.io.*; import java.util.arraylist; public class CharGraph { public static void main(string[] args) { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); (i) ns = new (i) (); String line; try { while ((line=reader.readline())!=null) { try { int n = Integer.parseInt(line); ns.add(n); catch(numberformatexception e) { catch (IOException e) { for (int n : ns) { int i; for (i=0; i<n; i++) { System.out.print("*"); System.out.println(); Java int char double boolean Integer Character Double Boolean 4

5 III. NumD : NumD.java public class NumD { public int num; public void print() { // 10 System.out.printf("%d", num); public void increment() { num++; public void incrementafterprint() { print(); System.out.printf(" "); increment(); 3 NumR, NumX, NumY : NumR.java public class NumR { private static String[] roman = { "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX", "X", "XI", "XII" ; public void print() { // if (num<=12) { System.out.print(roman[num-1]); else { System.out.print("??"); : NumX.java public class NumX { public boolean flag; public NumX(boolean b) { super(); flag = b; public void print() { // 16 if (flag) { // A F System.out.printf("%X", num); else { // a f System.out.printf("%x", num); // 01 // 02 // 03 // 04 // 05 // 06 // 07 // 08 // 09 // 10 // 11 // 12 // 13 // 14 // 15 // 16 // 17 5

6 : NumY.java public class NumY { private static String[] kazu = { " ", " ", " ", " ", " ", " ", " ", " ", " ", " " ; public void print() { // if (num<=10) { System.out.print(kazu[num-1]); else { System.out.print(" "); NumTest main : NumTest.java public class NumTest { public static void main(string[] args) { NumD[] ns = new NumD[3]; ns[0] = new NumR(); NumX x = new NumX(true); x.flag = false; ns[1] = x; ns[2] = new NumY(); // 9 ns[0].num = 9; ns[1].num = 9; ns[2].num = 9; int i, j; for (i=0; i<4; i++) { for (j=0; j<ns.length; j++) { ns[j].incrementafterprint(); System.out.println(" "); // // 01 // 02 // 03 // 04 // 05 // 06 // 07 // 08 // 09 // 10 // 11 // 12 // 13 // 14 // 15 // 16 // 17 // 18 // 19 // 20 (i) 3 (ii) NumX flag NumTest 6 NumX (iii) NumTest 6 main 6

7 IV. Java : BallAnimation.java import java.awt.*; import java.awt.event.*; import javax.swing.*; public class BallAnimation (i) { Thread ballthread = null; int x = 100, dx = 10, y = 100, dy = 16; public void init() { (ii) public void start() { if (ballthread==null) { (iii) ballthread.start(); public void stop() { ballthread = null; public void paint(graphics g) { super.paint(g); g.drawstring(" ", x, y); public void run() { Thread thisthread = Thread.currentThread(); while (ballthread==thisthread) { x += dx; y += dy; x %= 200; y %= 200; repaint(); try { Thread.sleep(300); catch (InterruptedException e){ 7

8 public void mouseclicked(mouseevent e) { x = e.getx(); y = e.gety(); public void mouseentered(mouseevent e) { public void mouseexited(mouseevent e) { public void mousepressed(mouseevent e) { public void mousereleased(mouseevent e) { (i) (iii) 8

9 Tree.java, MouseTest.java ( I), BubbleSort1.java, BubbleSort2.java, Point.java, ColorPoint.java Tree.java import java.awt.*; import javax.swing.*; import java.util.arraylist; import static java.lang.math.*; public class Tree extends JApplet { ArrayList<int[]> data = new ArrayList<int[]>(); public void drawtree(int d, double x, double y, double r, double t) { if (d==0) return; data.add(new int[] {(int)x, (int)y, (int)(x+r*cos(t)), (int)(y+r*sin(t))); drawtree(d-1, x+r*cos(t), y+r*sin(t), 0.5*r, t+0.2); drawtree(d-1, x+(0.55*r)*cos(t), y+(0.55*r)*sin(t), 0.5*r, t+1.25); drawtree(d-1, x+(0.45*r)*cos(t), y+(0.45*r)*sin(t), 0.5*r, t-1.3); public void init() { drawtree(6, 128, 255, 128, -PI/2); public void paint(graphics g) { for(int[] pts : data) { g.drawline(pts[0], pts[1], pts[2], pts[3]); MouseTest.java import javax.swing.*; import java.awt.*; import java.awt.event.*; public class MouseTest extends JApplet implements MouseListener { int x=50, y=20; public void init() { addmouselistener(this); public void mouseclicked(mouseevent e) { x = e.getx(); y = e.gety(); repaint(); return; public void mousepressed(mouseevent e) { public void mousereleased(mouseevent e) { public void mouseentered(mouseevent e) { public void mouseexited(mouseevent e) { public void paint(graphics g) { super.paint(g); // g.drawstring("hello WORLD!", x, y); 9

10 BubbleSort1.java import javax.swing.*; import java.awt.*; public class BubbleSort1 extends JApplet implements Runnable { int[] args = {10, 3, 46, 7, 23, 34, 8, 12, 4, 45, 44, 52; Color[] cs ={Color.RED, Color.ORANGE, Color.GREEN, Color.BLUE; Thread thread=null; public void start() { if (thread == null) { thread = new Thread(this); thread.start(); public void stop() { thread = null; public void paint(graphics g) { int i; super.paint(g); for(i=0; i<args.length; i++) { g.setcolor(cs[args[i]%cs.length]); g.fillrect(0, i*10, args[i]*5, 10); public void run() { int i, j; Thread thisthread = Thread.currentThread(); for (i=0; i<args.length-1; i++) { for (j=args.length-1; thread == thisthread && j>i; j--) { if (args[j-1]>args[j]) { // int tmp=args[j-1]; args[j-1]=args[j]; args[j]=tmp; repaint(); try { // repaint Thread.sleep(500); catch (InterruptedException e) { 10

11 BubbleSort2.java import javax.swing.*; import java.awt.*; import java.awt.event.*; public class BubbleSort2 extends JApplet implements Runnable, ActionListener { int[] args = { 10, 3, 46, 7, 23, 34, 8, 12, 4, 45, 44, 52; Color[] cs ={Color.RED, Color.ORANGE, Color.GREEN, Color.BLUE; Thread thread=null; private boolean threadsuspended=true; public void init() { JButton step = new JButton("Step"); step.addactionlistener(this); setlayout(new FlowLayout()); add(step); // start, stop, paint BubbleSort1.java public synchronized void actionperformed(actionevent e) { threadsuspended=false; notify(); public void run() { int i, j; for (i=0; i<args.length-1; i++) { for (j=args.length-1; j>i; j--) { if (args[j-1]>args[j]) { // int tmp=args[j-1]; args[j-1]=args[j]; args[j]=tmp; repaint(); try { // repaint synchronized(this) { while (threadsuspended) { wait(); threadsuspended=true; catch (InterruptedException e) { 11

12 Point.java public class Point { public int x, y; public void move(int dx, int dy) { x += dx; y += dy; public void print() { System.out.printf("(%d, %d)", x, y); public void moveandprint(int dx, int dy) { print(); move(dx, dy); print(); public Point(int x0, int y0) { x = x0; y = y0; ColorPoint.java public class ColorPoint extends Point { private String[] cs = {"black", "red", "green", "yellow", "blue", "magenta", "cyan", "white"; private int color; // public void print() { System.out.printf("<font color= %s >", getcolor()); super.print(); System.out.print("</font>"); public void setcolor(string c) { int i; for (i=0; i<cs.length; i++) { if (c.equals(cs[i])) { color = i; return; // public ColorPoint(int x, int y, String c) { super(x, y); setcolor(c); public String getcolor() { return cs[color]; // // 12

13 II Java ( ) I. 4 2 (i). (ii). II. III. (i). (i) (ii). IV. (iii). 5, 4, 4 (i). (ii). (iii). 1

14 2

I HTML HashMap (i) (ii) :.java import java.net.; import java.io.; import java.util.hashmap; public class SimpleStopWatch { public static voi

I HTML HashMap (i) (ii) :.java import java.net.*; import java.io.*; import java.util.hashmap; public class SimpleStopWatch { public static voi II Java 10 2 12 10:30 12:00 I. I III II. III. IV. ( a d) V. : this==null, T == N A ActionListener C class D actionperformed G getsource I implements K KeyListener J JApplet L addmouselistener M MouseListener