java中Properties有什么用

Properties的用法 
馬克- to-win：馬克 java社區(qū)：防盜版實(shí)名手機(jī)尾號(hào)： 73203。
馬克-to-win：Properties里面存著也是鍵值對(duì)，而且它更方便java對(duì)配置文件，字符串的操作，



例：3.9.1
import java.util.*;
public class TestMark_to_win {
    public static void main(String args[]) {
        Properties sala = new Properties();
        Set name;
        String str;
        sala.put("zs", "1111");
        sala.put("ls", "2222");
        sala.put("ww", "3333");
        sala.put("zl", "4444");

        // Show all name and sala in hashtable.
        name = sala.keySet(); // get set-view of keys
        Iterator itr = name.iterator();
        while (itr.hasNext()) {
            str = (String) itr.next();
            System.out.println("The sala of " +
            /* public String getProperty(String key)Searches for the property
             * with the specified key in this property list.*/
            str + " is " + sala.getProperty(str) + ".");
        }
        System.out.println();
        // look for state not in list -- specify default
        /*
         * Searches for the property with the specified key in this property
         * list. The method returns the default value argument if the property
         * is not found.
         */
        str = sala.getProperty("Mark", "Not Found");
        System.out.println("The sal of Mark is " + str + ".");
    }
}

結(jié)果：
The sala of ls is 2222.
The sala of zl is 4444.
The sala of zs is 1111.
The sala of ww is 3333.

The sal of Mark is Not Found.