Java Programming and Technical Programming Functions

Consider the below statements.

Statement 1 : Matcher class interprets the pattern in a String

Statement 2 : Matcher class matches the regular expression against the text provided

Which of the following is true?

A. Statement 2 alone is correct.
B. Both Statement 1 and 2 are incorrect.
C. Statement 1 alone is correct.
D. Both Statement 1 and 2 are correct

Read Solution (Total 1)

In Java, the Matcher class is used to interpret a pattern in a string and match the regular expression against the text provided.
The Matcher class is part of the java.util.regex package, which provides classes for working with regular expressions in Java. The Matcher class provides methods for searching, matching, and replacing text using regular expressions.
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Java Other Question

What is the output of the following program?

import java.util.Arrays;

class Test
{
public static void main(String args[])
{
String[] cities = new String[]{"London", "Paris", "NewYork", "HongKong", "Tokyo"};
String[] metros = new String[]{"London", "Paris", "NewYork", "HongKong", "Tokyo"};
String[] capitals = cities;
System.out.println("cities == metros : " + (cities == metros));
System.out.println("cities == capitals : " + (cities == capitals));
System.out.println("cities.equals(metros) : " + cities.equals(metros));
System.out.println("cities.equals(capitals) : " + cities.equals(capitals));
System.out.println("Arrays.equals(cities, metros) : " + Arrays.equals(cities, metros));
System.out.println("Arrays.equals(cities, capitals) : " + Arrays.equals(cities, capitals));
}
}

A. cities == metros : false
cities == capitals : true
cities.equals(metros) : true
cities.equals(capitals) : true
Arrays.equals(cities, metros) : false
Arrays.equals(cities, capitals) : true

B. cities == metros : false
cities == capitals : true
cities.equals(metros) : true
cities.equals(capitals) : true
Arrays.equals(cities, metros) : true
Arrays.equals(cities, capitals) : true

C. cities == metros : false
cities == capitals : true
cities.equals(metros) : false
cities.equals(capitals) : true
Arrays.equals(cities, metros) : true
Arrays.equals(cities, capitals) : true

D. cities == metros : false
cities == capitals : true
cities.equals(metros) : false
cities.equals(capitals) : true
Arrays.equals(cities, metros) : true
Arrays.equals(cities, capitals) : false StringBuilder is less efficient and slower than StringBuffer. State true or false.