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public
class
Foo {
private
int
x = 100;
public
int
getX() {
return
x;
}
public
int
fix(int
y) {
x = x - y;
return
x;
}
}
public
class
MyRunnable implements
Runnable {
private
Foo foo = new
Foo();
public
static
void
main(String[] args) {
MyRunnable r = new
MyRunnable();
Thread ta = new
Thread(r, "Thread-A"
);
Thread tb = new
Thread(r, "Thread-B"
);
ta.start();
tb.start();
}
public
void
run() {
for
(int
i = 0; i < 3; i++) {
this
.fix(30);
try
{
Thread.sleep(1);
} catch
(InterruptedException e) {
e.printStackTrace();
}
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Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
2002Ä꣬ÖøÃûµÄ”Java2ÐéÄâ»úÄÚÄ»”×÷Õ߶ÔJavaÖ®¸¸Õ²Ä·Ë¹·¸ß˹ÁÖ½øÐÐÁË·Ã̸£¬Ì¸»°ÖУ¬¸ß˹ÁÖ¾ÍÈí¼þÉè¼ÆµÄ¸´ÔÓÐÔºÍËã·¨·¢±íÁËËûµÄһЩ¿´·¨¡£¶ÔÓÐÖ¾ÓÚ´ÓÊÂITÈí¼þÐÐÒµµÄͯЬÀ´Ëµ£¬ÌýÌýר¼ÒµÄÒâ¼û£¬Ó¦¸Ã»¹ÊDz»ÎÞñÔÒæµÄ¡£
JavaÖ®¸¸James Gosling
2002Äê3ÔÂ22ÈÕ£¬Bill Venners²É·ÃÁËJavaÖ®¸¸£¬Ì¸ÂÛÁËÓйØÆóÒµÈ ......
public class P {
public static void main(String[] args){
String pattern="000";
java.text.DecimalFormat df = new java.text.DecimalFormat(pattern);
int i = 10,j=6;
System.out.println("i="+df.format(i)+"\nj="+df.format(j));
}
}
---------------------Êä³ö-----------------------
i=010 ......
import java.io.*;
public class QueueArray {
Object[] a; //¶ÔÏóÊý×飬¶ÓÁÐ×î¶à´æ´¢a.length-1¸ö¶ÔÏó
int front; //¶ÓÊ×ϱê
int rear; //¶Óβϱê
public Qu ......