Replace string with dynamic value

Question

I have pattern like '{YY}-{MM}-{SEQNO}'. I want to replace above string by dynamic value.

For example

{YY} with - 17 
{MM} with - 06
{SEQNO} WITH - 0001

What is the way to that in java?

Actually, `String.replace()` is better, as it doesn't require regular expressions - this is more efficient and has less problems with special characters. — RealSkeptic, Jun 14 '17 at 11:52
so the ouput must be ***{17}-{06}-{0001}*** or ***17-06-0001*** ??? — ΦXocę 웃 Пepeúpa ツ, Jun 14 '17 at 11:53

Steve Smith · Answer 1 · 2017-06-14T11:54:49.690

0

Use String.replace().

String template = "'{YY}-{MM}-{SEQNO}'";
template = template.replace("{YY}", "17");
template = template.replace("{MM}", "06");
template = template.replace("{SEQNO}", "0001");

(Thanks to @RealSkeptic for improvements).

edited Jun 14 '17 at 11:54

answered Jun 14 '17 at 11:52

Steve Smith

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The replacement should include the braces. You don't want to get `{17}-{06}-{0001}`. Also, you probably don't want to replace the template itself. – RealSkeptic Jun 14 '17 at 11:53
@RealSkeptic Thanks. I wasn't sure if OP wanted the braces or not. – Steve Smith Jun 14 '17 at 11:55

score 0 · Answer 2 · answered Jun 14 '17 at 11:55

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If you want to print like 17-06-0001 Use

System.out.printf("%S-%S-%S\n", ""+17, ""+06, ""+0001);

or If you want to print like 17-6-1 Use

System.out.printf("%d-%d-%d\n", 17, 06, 0001);

answered Jun 14 '17 at 11:55

Suraj Khanra

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What do you do when the template is changed like `{MM}/{SEQNO}-/{YY}`? – Jun 14 '17 at 12:04

score 0 · Answer 3 · answered Jun 14 '17 at 12:36

method one(easier method):

String a = "{YY}-{MM}-{SEQNO}";
a = a.replace("YY", "17").replace("MM", "06").replace("SEQNO", "0001");
System.out.println(a);
//Output:  {17}-{06}-{0001}

method two:

a = Pattern.compile("YY").matcher(a).replaceAll("17");
a = Pattern.compile("MM").matcher(a).replaceAll("06");
a = Pattern.compile("SEQNO").matcher(a).replaceAll("0001");
System.out.println("My Output is : " +a);
//Output:  My Output is : {17}-{06}-{0001}

Method three:

Have a look at this question -without using replace().

Replace string with dynamic value

3 Answers3