think in java 里面的一个小程序，帮忙解读一下谢谢。详细的。

[蝴蝶Poj]

//Property.java
improt java.uitl.*;
public class Perperty{
  public static void main(String[] args){
    System.out.println(new Date());
    Properties p = System.getProperties();
    p.list(System.put);
    System.out.printin("--Memory Usage--");
    Runtime rt = Runtime.getProperty();
    system.out.prinln("Total memory = "+rt.totelMemory+"Free memoty = "+tr.freeMemoty);
  }
}

[蝴蝶Poj]

//Property.java import java.util.Date; import java.util.Properties; public class Property { public static void main(String[] args) { System.out.println(new Date()); 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 memoty = " + rt.freeMemory()); } }

[渣受3T]

public static void main(String[] args){
	    System.out.println(new Date());
	    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 memoty = "+rt.freeMemory());
	}

你的代码能运行？ 这断代码的大概意思是输出系统当前时间，输出虚拟机的参数，输出总内存，空闲内存

[LCore]

引用 1 楼 zhaokewen05643 的回复:

//Property.java import java.util.Date; import java.util.Properties; public class Property { public static void main(String[] args) { System.out.println(new Date()); 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 memoty = " + rt.freeMemory()); } }

楼主要学会看API文档

package com.kiritor;

//Property.java
import java.util.Date;
import java.util.Properties;

public class Property {
	public static void main(String[] args) {
		System.out.println(new Date());//得到系统时间，无需多说
		Properties p = System.getProperties();//得到相关属性
		p.list(System.out);//将属性列表指定到System.out输出流
		System.out.println("--Memory Usage--");
		Runtime rt = Runtime.getRuntime();//得到运行时的一些信息
		System.out.println("Total memory = " + rt.totalMemory()
				+ "Free memoty = " + rt.freeMemory());
	}
}

[oh_Maxy]

3L说的对，如果方便的话，跟踪代码，看看源码也是不错的选择~