}
参考答案
一、 选择题答案 DDCDD CBDCAB 二、多项选择题答案
1．ACD 2.AB 3.AD 4.CD 5.AD 6.AC 7.AD 8.BC 9.BD 10.BCD 11.BD 12.ABD 13.BD 14.ABD 三、 填空题答案
填空第1题 Collection，List，Map，Set 填空第2题 7
填空第3题 因为在A的main方法中,还没有A的实例就要试图生成内部类的实例四、 编程题答案 编程第1题
import java.io.*; public class Point {
int x,y;
public Point(int x,int y) {
this.x = x; this.y = y; }
public Point getPoint() {
Point tempPoint = new Point(x,y); return tempPoint; }
public void setPoint(Point point) {
this.x = point.x;
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this.y = point.y; }
public static void main(String args[]) {
Point Point1 = new Point(3,4);
System.out.println(\ Point Point2 = Point1.getPoint();
System.out.println(\ Point Point3 = new Point(5,6); Point1.setPoint(Point3);
System.out.println(\ } } 编程第2题
import java.io.*;
class FileCopy {
public static void main(String[] args) {
FileInputStream in; FileOutputStream out; if (args.length<2) {
System.out.println(\ System.exit(-1); } try {
in = new FileInputStream(args[0]); out = new FileOutputStream(args[1]); copyFile(in,out); }
catch (Exception e) {
System.out.println(e); } }
private static void copyFile(FileInputStream in, FileOutputStream out) {
int length;
byte buf[] = new byte[1024];
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try{
while ((length=in.read(buf,0,1024))!=-1) {
out.write(buf, 0, length); } }
catch (Exception e)
{System.out.println(\ System.exit(-1); } } } 编程第3题
import java.awt.*; import java.awt.event.*; import java.applet.*; import java.util.*;
public class TimeViewer extends Applet implements ActionListener, Runnable {
Thread timer;
TextField in, out; Button bb;
Panel p1, p2, p3; boolean state;
public void init() {
in = new TextField(20); out = new TextField(20);
bb = new Button(\ p1 = new Panel(); p2 = new Panel(); p3 = new Panel();
setLayout(new GridLayout(3, 1)); setSize(200,100); p1.add(in); p2.add(bb); p3.add(out); add(p1); add(p2); add(p3);
bb.addActionListener(this); timer = new Thread(this);
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state = true; timer.start(); }
public void actionPerformed(ActionEvent e) { //out.setText(in.getText()); out.setText(currentTime()); }
public void run() { while(true) { try {
timer.sleep(1000);
} catch (InterruptedException e) { } in.setText(currentTime());; } }
String currentTime() { Date now = new Date();
String str = now.getHours() + \now.getSeconds();
return str; } }
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