Runtimert=Runtime.getRuntime()importjava.util.*;publicclassProperty{publicstaticvoidmain(Stringargs[]){Dated=newjava.util.Date();System.out.println(d);Propertiesp=System.getProperties();p.list(System.out);System.out.println("---Mem

Question

Runtime rt = Runtime.getRuntime()
import java.util.*;
public class Property{
public static void main(String args[]){
Date d = new java.util.Date();
System.out.println(d);
Properties p = System.getProperties();
p.list(System.out);
System.out.println("--- Memory Usage:");
Runtime rt = Runtime.getRuntime();
System.out.println("Total Memory= " + rt.totalMemory()
+ " Free Memory = " + rt.freeMemory());
}
}
在代码中p.

Answer 1

去查api（学java的不要说不知道api）