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public class EchoDefaultSystemEncoding
{
    public static void main(String[] args)
    {
           String encoding = System.getProperty("file.encoding");
           System.out.println("Default System Encoding:" + encoding);
    }
}


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java ´íÎó´úÂëÌáʾ

 //=============================Êä³öÆæÊý
public class OddTest {
public static boolean isOdd(int i){
return i % 2 != 0; //±È½Ï i % 2 == 0;×¢£º -1%2 = -1
}
public static void main(String[] args) {
for(int i = -10; i <= 10; i++) {
System.out.println(isOdd(i));
}
}
}
// ......

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java URI URL ¸öÈËÀí½â¡£

URI ÊÇ×ÊÔ´±êʶ·û¡£¾ÍÊÇÏ൱ÓÚÒ»¸öÈ˵ļÒͥסַ¡£
URLºÍURIÀàËÆ¡£ÊÇ×ÊÔ´¶¨Î»µÄ¡£ ºÍURI²»Í¬µÄ¾ÍÊÇURLÌṩÁË»ñÈ¡¶«Î÷µÄ·½·¨¡£
        java.io.InputStream l_urlStream;
       // Ò²¿ÉÒÔ»»³Éuri,È»ºóµ÷ÓÃuri.toURL
        ......

javaÃæÊÔÌ⣬ÖÊÊýÇóºÍ

public class Test {
 /**
  * @param args
  */
 public static void main(String[] args) {
  /**
   * ÇóÖÊÊýºÍ£¬
   * Èç:
   * sum(1)=2=2
   * sum(2)=2+3=5
   * sum(3)=2+3+5=10
   * sum(4)=2+3+5+7=17
& ......
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