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J 的代码
j3_39.java
class TestThread3 {
public static void main(String args[]){
Thread t = new Runner3();
t.start();
}
}
class Runner3 extends Thread {
public void run() {
for(int i=0; i
j3_07.java
public class j3_07{
public static void main(String argv[]){
String str = "abcdefg";
System.out.print(str.charAt(2));
System.out.print(str.substring(1, 2));
System.out.print(st
j3_16.java
class Person {
private int id;
public static int total = 0;
public Person() {
total++;
id = total;
}
}
class OtherClass {
public static void main(String args[]) {
Person.total =
j3_27.java
class Test{
public static void main(String[] args) {
String friends[]={"lisa","bily","kessy"};
for(int i=0;i
j3_28.java
class Test{
public static void main(String[] args){
try{
String friends[]={"lisa","bily","kessy"};
for(int i=0;i
j3_42.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class HelloWorldJFC extends JComponent {
public void paint(Graphics g){
g.setColor(Color.black);
g.drawString ("He
j3_25.java
import java.util.*;
class TestList{
public static void main(String[] args) {
ArrayList h = new ArrayList();
h.add("1st");
h.add("2nd");
h.add(new Integer(3));
h.add(new Double(4.0));
j3_13.java
import java.util.*;
class Person {
public String name;
public int age;
public Date birthDate;
public String getInfo() {
return "name: " + name + "\nage: " + age ;
}
}
class Student ext
j3_05.java
public class j3_05{
public static void main(String args[]){
int[] s;
s = new int[10];
for ( int i=0; i
j3_43.java
import java.awt.Graphics;
import java.applet.Applet;
public class j3_43 extends Applet {
String topic = "abcdefg" ;
public void init () {
topic = getParameter("topic");
}
public