分割Java字串

Question

I have a YYYYMM date in String format. I want to split it into YYYY and MM and replace the existing YYYY with a new year and concatenate it back in Java.

For example, I have 201201 . I want to split it into 2012 and 01 and change 2012 to 2000 and finally get 200001 . How do I do it?

I googled it but everyone seemed to have a - or a * in between.

Or if anyone knows a better way to do it (maybe change it into a Date and modify the year), I am all ears.

Any help would be appreciated!

Thanks

Answer 1

One uber-simple approach is just to use string manipulation:

String orig = "201201";
String changed = "2000" + orig.substring(4);

EDIT: A looping example, as per the comment:

// Loop over the inputs
for (String date : getDatesFromFile() {
    // Loop over 10 years:
    for (int year = 2000; year <= 2010; ++year) {
        String newDate = String.valueOf(year) + date.substring(4);

        // write newDate to an output file
    }
}

Answer 2

Take a look to this code to see if it can help you.

 String myDate = "201201";
  String myDate1 = myDate.substring(0, 4);
  String myDate2 = myDate.substring(4);
  myDate1 = "2000"; //Change the logic accordingly with your spec
  System.out.println(myDate1 + myDate2);

Answer 3

try This :

  String Str = new String("201201");
  System.out.print("Replace Year :" );
  System.out.println(Str.replace('2012', '2000'));