Java数据类型 测验面试题

/**
 * @author Will.Wang
 * @date 2018年2月6日
 */
public class Test {
     public static void change(String s, int i, StringBuffer sb, Person p) {
           System.out.println("----------开始----------");
           s = "123";
           System.out.println(s);
           
           i = 3;
           System.out.println(i);
           
           p.setAge(100);
           System.out.println(p.toString());
           p = new Person("bb", 44);
           System.out.println(p.toString());
           
           sb.append("woshi");
           System.out.println(sb.toString());
           sb = new StringBuffer("sbsb");
           System.out.println(sb.toString());
           System.out.println("----------结束----------");
     }
     public static void main(String[] args) {
           String s = "aaa";
           int i = 1;
           i = 2;
           StringBuffer sb = new StringBuffer("buff");
           Person p = new Person("aa", 12);
           System.out.println(s);
           System.out.println(i);
           System.out.println(sb.toString());
           System.out.println(p.toString());
           change(s, i, sb, p);
           // s="222";
           System.out.println(s);
           System.out.println(i);
           System.out.println(sb.toString());
           System.out.println(p.toString());
     }
 
//结果    
//                         aaa
//                         2
//                         buff
//                         Person [name=aa, age=12]
//                         ----------开始----------
//                         123
//                         3
//                         Person [name=aa, age=100]
//                         Person [name=bb, age=44]
//                         buffwoshi
//                         sbsb
//                         ----------结束----------
//                         aaa
//                         2
//                         buffwoshi
//                         Person [name=aa, age=100]
}