Java String类型时间比较大小

package com.zz.bridge.impl;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;

/**
* 测试类
* Copyright 2015年6月9日
* created by txxs
* all right reserved
*/
public class BridgeTest {
public static void main(String args[]){
DateFormat df = new SimpleDateFormat("yyyyMM");
//获取Calendar实例
Calendar currentTime = Calendar.getInstance();
Calendar compareTime = Calendar.getInstance();
try {
//把字符串转成日期类型
currentTime.setTime(df.parse("201406"));
compareTime.setTime(df.parse("201506"));
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//利用Calendar的方法比较大小
if (currentTime.compareTo(compareTime) > 0) {
System.out.println("前者时间小");
}else{
System.out.println("后边时间大");
}
//转成数字后比较大小
int startTime = Integer.parseInt("201406");
int endTime = Integer.parseInt("201506");
System.out.println(endTime-startTime);
}
}