java 7 新特性/switch/枚举类型/二进制/字面量

package com.xdl.java7;import org.junit.Test;import com.xdl.ienum.XuDaoLong_Final_Val;public class Day_One {/** * java7string新特性switch与枚举类型,二进制,字面量 *  * @param nameString * @param genderString * @return */public static String switch_sex(String nameString, String genderString) {/*采用emun方法定义常量,支持switch*/XuDaoLong_Final_Val male = XuDaoLong_Final_Val.MALE;String flagString = "";/* genderString=null;表达式的值不能为null,否则抛出空指针 */switch (male) {case MALE:flagString = nameString + "先生";break;/* * 等价上面的case子句 case "\u7537": flagString =nameString +"先生"; break; * 实际上字符串和case子句在编译被替换成了对应的哈希值,使JVM看到的仍然是整数类型兼容的类型 */case FEMALE:flagString = nameString + "女士";break;default:break;}return flagString;}@Testpublic void TestSwitchIsCorrect() {System.out.println(switch_sex("许道龙", "男"));System.out.println("二进制"+0b101101);System.out.println("八进制"+0101101);System.out.println("十六进制"+0X101101);/*数值字面量下使用下划线,但不允许_100,120_,0b10101*/System.out.println(1_000_000_000);}/*经JAD反编译就这样紫了=.=: * public static String switch_sex(String nameString, String genderString)  {    String flagString = "";    String str1;    switch ((str1 = genderString).hashCode()) {    case 22899:  if (str1.equals("女")) break;      case 30007:  if ((goto 106) && (str1.equals("男")))      {        flagString = nameString + "先生";        return flagString;        flagString = nameString + "女士"; }      break;    }    return flagString;  }*/}