Question

How can direct string matching be changed to work with regular expressions?

Answer 1

Given below is a Java code which will demonstrate how direct string matching be changed to work with regular expressions?

1. DirectStringMatching.java

import java.util.regex.Pattern;

public class DirectStringMatching {

public boolean isStringDirectlyMatched(final String str1, final String str2){

return (str1.equals(str2) ? true : false); // return true if both string1 and string2 are same

}

public boolean isStringPatternMatched(final String str1, final String pattern){

return (Pattern.matches(pattern, str1) ? true : false); // return true is str1 matches Pattern: pattern

}

public static void main(String[] args) {

DirectStringMatching directStringMatchingObj = new DirectStringMatching();

String str1, str2, pattern;

str1 = "Gopal Malaker";

str2 = "Gopal Malaker";

System.out.println("str1 and str2 are matched: " + directStringMatchingObj.isStringDirectlyMatched(str1, str2));

str2 = "Chegg";

System.out.println("str1 and str2 are matched: " + directStringMatchingObj.isStringDirectlyMatched(str1, str2));

str1 = "GopalMalaker";

pattern = "[a-z|A-Z|0-9]*";

System.out.println("str1 and pattern are matched: " + directStringMatchingObj.isStringPatternMatched(str1, pattern));

}

}

The Output is attached below:-

Console x <terminated> DirectStringMatching [Java Application] C:\Program FilesVava jdk1.8.0_121\bin\javaw.exe (Apr str1 and str2 are matched: true str1 and str2 are matched: false str1 and pattern are matched: true

Please let me know in case of any clarifications required. Thanks!