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public static void getSysProp(){
Properties props = System.getProperties();
Set<Entry<Object,Object>> res = props.entrySet();
Iterator it = res.iterator();
while (it.hasNext())
{
Map.Entry e = (Map.Entry)it.next();
......

java±ÊÊÔ

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Àà¾ÍÊǶÔÒ»¸öÊÂÎ ......

Java SE Static Inner

/*ÄÚ²¿ÀàʹÓÃʾÀý*/
package demo;
class Outer{
 int outer_i=100;
 static int outer_j=200;
 final int outer_k=300;
 void test(){
  Inner in = new Inner();
  in.display();
 }
 static class Inner{
  void display(){
    ......

Java SE ¶à̬

/*¶à̬ʾÀý*/
package demo;
class AA {
 public void f(){
  System.out.println("f in AA");
 }
}
class BB extends AA{
 public void f(){
  System.out.println("f in BB");
 }
 
}
public class Test_Dt {
 public static void main(String[] args) ......

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¸øÊý×鸳ֵµÄ±ã½Ý·½Ê½£º String s=reader.nextLine();    char a[]=s.toCharArray();ÕâÑù¾Í²»ÓÃʹÓÃÂé·³µÄforÑ­»·À´¸³ÖµÁË
        Êä³öÊý×éÄÚÈݵıã½Ý·½Ê½£ºString code=new String(a); //aÊÇÒ»¸öÊý×éÃû
   System.out.println("Ô­ÎÄÊÇ"+code);
 &nb ......
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