练习1

package com.atguigu.java4;
import org.junit.Test;
/*
 * 关于包装类使用的面试题
 *  
 */
public class InterviewTest {
    @Test
    public void test1(){
  Object o1 = true ? new Integer(1) : new Double(2.0);
  System.out.println(o1);//1.0 类型提升了成double型了
    }
    @Test
    public void test2(){
  Object o2;
  if(true)
      o2 = new Integer(1);
  else
      o2 = new Double(2.0);
  System.out.println(o2);//1
    }
}