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°ÑÒ»¸öString³£Á¿copyµ½String ¶ÔÏóÖÐͨ³£ÊǶàÓà¡¢ÀË·Ñʱ¼äµÄ
Public class test{
  Public void method(){
    System.out.print (str);
}
private String str = new String ("1");  //ÕâÀïн¨¶ÔÏóÊÇÍêȫûÓбØÒªµÄ
private String str2=”2”  //ÕýÈ·µÄÓ¦¸ÃÈç´Ë
}
²Î¿¼£ºJoshua Bloch: "Effective Java - Programming Language Guide"
£¨2£©    ±ÜÃâʹÓò»±ØÒªµÄǶÌס£
  ¹ý¶àµÄǶÌ×»áʹÄãµÄ´úÂ븴ÔÓ»¯£¬¼õÈõ¿É¶ÁÐÔ¡£
  Public class test {
   String add (){
Int c=(a=a+b)+b;  //¹ýÓÚ¸´ÔÓ
Return c
}
}
²Î¿¼£ºhttp://java.sun.com/docs/codeconv/html/CodeConventions.doc9.html#177
£¨3£©    ±ÜÃâÔÚͬһÐÐÉùÃ÷²»Í¬ÀàÐ͵Ķà¸ö±äÁ¿
  ÕâÑù¿ÉÒÔʹ³ÌÐò¸ü¼ÓÇåÎú£¬±ÜÃâ»ìÂÒ
    private int index, index1[];
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private int index; 
private int index1[];
²Î¿¼£ºhttp://java.sun.com/docs/codeconv/html/CodeConventions.doc5.html#2992
(4)    ÔÚÿһÐÐÀïдһÌõÓï¾ä
  ÕâÌõ¹æÔò²»°üÀ¨forÓï¾ä£º±ÈÈ磺'for (int i = 0; i < 10; i++) x--;’¿ÉÒÔÔö¼Ó´úÂëµÄ¿É¶ÁÐÔ¡£
  public class OSPL {
    int method (int a, int b) {
        int i = a + b; return i;  // ¿É¶ÁÐÔ²»Ç¿
}
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public class OSPLFixed {
    int method (int a, int b) {
        int i = a + b; 
        return i; 
    }
}
²Î¿¼£ºSection 7.1 of http://java.sun.com/docs/codeconv/html/CodeConventions.doc6.html#431
 £¨5£©¾­³£´Ófinalize ()Öе÷ÓÃsuper.finalize ()
  ÕâÀïµÄfinalize ()ÊÇjavaÔÚ½øÐÐÀ¬»øÊÕ¼¯µÄʱºòµ÷Óõģ¬ºÍfinally²»Ò»Ñù¡£Èç¹ûÄãµÄ¸¸ÀàûÓж¨Òåfinally£¨£©µÄ»°£¬ÄãÒ²Ó¦¸Ãµ÷Óá£ÕâÀïÓÐÁ½¸öÔ­Òò£º£¨1£


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import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.event.*;
public class ThreadDemo extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
public ThreadDemo() {
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int a = 14;
int b = 2;
System.out.println(a >>> b);// 3
int c = -14;
int d = 2;
System.out.println(c >>> d);// 1073741820
(b) >>·ûºÅλ²»±ä£¬ÆäËûλÓÒÒÆ£¬¸ßλÓÃ0Ìî³ä£¬Æä½á¹ûÓëa/2bÏàͬ£»
int a = 14;
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 Runtime.getRuntime().exec("ls");
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