Question

Using java

Write a program which asks the user for an integer and then prints the following patterns based on that integer. Input Validation For Pattern 1, the input must be a value between 1 and 999 For Pattern 2, the input must be a value between 1 and 26. Requirements: For Pattern 1: must be able to work with up to three digit numbers. You will want to use printf to get the spacing correct. For Pattern 2: make note of what is uppercase and what is lowercase. You must use for loops to solve this problem. Program must be dynamic and work for any of the valid input values. You CANNOT hardcode the output. HINT You will need to use nested loops for this one. Each pattern is its own set of nested loops.

Sample Outputs

Answer 1

import java.io.*;

import java.util.*;

class pattern

{

public static void main(String args[])

{

int p1,p2;//for pattern1 and pattern 2

int m,n;

Scanner s=new Scanner(System.in);

int flag1=1,k;

System.out.print("how many rows for pattern1 ? : ");

p1=s.nextInt();

if(p1>0 && p1<1000) flag1=0;

while(flag1==1)

{

System.out.print("how many rows for pattern1 ? : ");

p1=s.nextInt();

if(p1>0 && p1<1000) flag1=0;

}

m=p1;

System.out.println();

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

{

k=m;

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

{

System.out.print(k-- +" ");

}

System.out.println();

}

int flag2=1;

System.out.print("how many rows for pattern2 ? : ");

p2=s.nextInt();

if(p2>0 && p2<27) flag2=0;

while(flag2==1)

{

System.out.print("how many rows for pattern2 ? : ");

p2=s.nextInt();

if(p2>0 && p2<27) flag2=0;

}

n=p2;

System.out.println();

for(int i=n;i>=1;i--)

{

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

{

if(j%2==0)

{

System.out.print((char)(j+64+32) +" ");

}

else

{

System.out.print((char)(j+64) +" ");

}

}

System.out.println();

}

}

}

C: \Users\SARATHCHNDRANDesktop\HomeworkLib>javac pattern.java C: \Users\SARATHCHNDRANDesktop\HomeworkLib>java pattern how many rows for pattern1 ?: 10 10 10 9 10 9 8 10 9 8 7 10 9 8 7 6 10 9 8765 10 9 8765 4 10 9 8765 4 3 10 9 8765 4 3 2 10 9 8765 43 2 1 how many rows for pattern2 ? 26 Ab Cd A b C A b C:\Users SARATHCHNDRA\Desktop\HomeworkLib>