CODEWITHSUNDEEP
java
Radheya
Radheya

Reputation: 821

not able to correctly detect double quotes in java

I am trying to use string split to solve my problem, but my program is only partially right. I am new to regex and still trying to understand how to implement it for complicated patterns.

I have below mentioned string formats: 

String a = Internal module control "memory" sensor
String b = Internal module control memory "sensor"
String c = "Internal" module control "memory" sensor

The output I expect should be like:

String a = Internal module control "memory"/memory //(with or without quotes is fine) 
String b = Internal module control memory "sensor"/sensor //(both are fine)
String c = "Internal"/Internal module control "memory"/memory //(here also both are fine)

What I tried:

My program works perfectly fine for String a and String c, but when I come across case like mentioned in String b it fails.

String[] words = a.split("\"");
for (int i=0; i<words.length-1; i++) {
             final_desc += words[i];
        }

my o/p for a, b and c is:

a = Internal module control memory 

(fails) I expect: b = Internal module control memory sensor // I get b = Internal module control memory

c = Internal module control memory

P.S.

In general, I want to remove everything after last quote no matter how many quotes there are in the given string and if there are quotes in the last word then it should consider that word also, like presented in String b

Upvotes: 1

Views: 147

Answers (2)

Nikolay Bonev
Nikolay Bonev

Reputation: 151

Try to use the replace() method of the String.

Replace method

Remove this block

String[] words = a.split("\"");
for (int i=0; i<words.length-1; i++) {
             final_desc += words[i];
        }

and put on its place this code

int lastQuote = a.lastIndexOf("\"");

if(lastQuote > 0) {
   final_desc = a.subString(0, lastQuote).replace("\"", "");
}else {
   final_desc = a;
}

Upvotes: 1

VHS
VHS

Reputation: 10174

Use the other version of split which takes an additional limit argument.

So

replace

String[] words = b.split("\"");

with

String[] words = b.split("\"", -1);

reason

Here specifying a negative limit value will make split apply the pattern as many times as possible and also not disregard the trailing empty strings. Read the Java docs for more information.

Upvotes: 1

Related Questions