Question

please answer this Java pattern​

Answer 1

Answer:

The Java Pattern class ( java.util.regex.Pattern ), is the main access point of the Java regular expression API. ... The Java Pattern class can be used in two ways. You can use the Pattern.matches() method to quickly check if a text (String) matches a given regular expression.

Explanation:

Answer 2

Question:-

Write a program in Java to display the following pattern.

1

2 3

4 5 6

7 8 9 10

Program:-

import java.util.*;

class Pattern

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

System.out.print("Enter the number of rows: ");

int n=sc.nextInt();

int a=1;

for(int i=1;i<=n;i++)

{

for(int j=1;j<=i;j++)

System.out.print(a++ + " ");

System.out.println();

}

}

}