systemdemo.java

软通公司培训的课件和习题里面有答案。。。

package com.nine.java;

import java.util.Enumeration;
import java.util.Properties;

public class SystemDemo {

	public static void main(String[] args) {
		Properties sp = System.getProperties();
		Enumeration e = sp.propertyNames();
		while (e.hasMoreElements()) {
			String key = (String) e.nextElement();
			System.out.println(key + " = " + sp.getProperty(key));
		}
	}
}