how to extract a substring from a given string in java

Question

I want to extract substring of a given string. the example string is rta=0.037ms;3000.000;5000.000;0; pl=10%;80;100;; rtmax=0.125ms;;;; rtmin=0.012ms;

I want to get only 0.037ms after "rta=" and percent after pl=. I tried to splite the above string by space and then by semicolon. did not work.

write a regex statement or use string.spit() and split at the spaces — ja08prat
– ja08prat, Commented Jul 24, 2017 at 19:04
Possible duplicate of Java - Simplest way to get characters that come after substring inside string — Jenna Sloan
– Jenna Sloan, Commented Aug 16, 2017 at 20:01

Florian · Accepted Answer · 2017-07-24 19:15:04Z

5

String s = "rta=0.037ms;3000.000;5000.000;0; pl=10%;80;100;; rtmax=0.125ms;;;; rtmin=0.012ms;";
Pattern pattern = Pattern.compile("rta=(.*?);.*pl=(.*?);");
Matcher matcher = pattern.matcher(s);
if(matcher.find()){
    System.out.println(matcher.group(1));
    System.out.println(matcher.group(2));
}

answered Jul 24, 2017 at 19:15

Florian

1407 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

learner Over a year ago

Thanks.. i almost wrote the same regex but missed the semicolons. it helped thanks again.

Ihdina · Accepted Answer · 2017-07-24 19:19:51Z

2

String str = "rta=0.037ms;3000.000;5000.000;0; pl=10%;80;100;; rtmax=0.125ms;;;; rtmin=0.012ms;";
String[] parts = str.split(";");
String part1 = parts[0]; // rta=0.037ms
String part2 = parts[4]; // pl=10%
...

System.out.println(part1.substring(4)); // 0.037ms
System.out.println(part2.substring(4)); // 10%

edited Jul 24, 2017 at 19:19

answered Jul 24, 2017 at 19:09

Ihdina

2,02513 silver badges23 bronze badges

5 Comments

user85421 Over a year ago

probably you meant String string = ... not str

Ihdina Over a year ago

@Carlos, yes.. typo mistaken :)

lambad Over a year ago

The second sout should be, System.out.println(part2.substring(4));

Ihdina Over a year ago

@karna, yes.. I see one space on there :)

learner Over a year ago

Thanks again for this answer too. this is also the right answer. thanks again.

Collectives™ on Stack Overflow

how to extract a substring from a given string in java

2 Answers 2

1 Comment

5 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

5 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related