• On August 9, 2019
• By Karmehavannan
• 0 Comment
• Categories: pyramid triangle, star pattern
• Tags: Java language, Java programs

Display integrated pyramid star pattern in Java using while loop

Display integrated pyramid star pattern in Java using while loop

In this tutorial, we will discuss a concept of  Display integrated pyramid star pattern in Java using while loop.

In Java language, we can use for loop , while loop and do-while loop to display different number (binary, decimal), alphabets or star pattern programs.

In this article, we are going to learn  how to Display double pyramid star pattern  using while loop in Java programming language

Integrated pyramid Star pattern 1

Program 1

import java.util.Scanner;
class DoublePyramidWhile{
public static void main(String args[]){
    int i,j;  //variable declaration
    Scanner scan=new Scanner(System.in);
//create a scanner object for input

System.out.print("Enter the number of rows: ");
int row=scan.nextInt();  //get input from user for number of rows
i=1;
while(i<=row){   
    j=i;
    while(j<=row){  //print upper part of pattern
        System.out.print("*");
        j++;
    }
    i++;
    System.out.print("\n");
}

i=row-1;
while(i>=1){    //print lower part of pattern
    j=i;
    while(j<=row){
        System.out.print("*");
        j++;
    }
    i--;
    System.out.print("\n");
}
}
}

When the above code is executed, it produces the following results

 

Integrated pyramid Star pattern 2

Program 2

import java.util.Scanner;
class DoublePyramidWhile1{
public static void main(String args[]){
    int i,j;  //variable declaration
    Scanner scan=new Scanner(System.in);
//create a scanner object for input

System.out.print("Enter the number of rows: ");
int row=scan.nextInt();  //get input from user for number of rows
i=1;
while(i<=row){   
    j=1;
while(j<i){    //print upper part of pattern
    System.out.print(" ");
    j++;
}
j=i;
    while(j<=row){
        System.out.print("*");
        j++;
    }
    i++;
    System.out.print("\n");
}

i=row-1;
while(i>=1){     //print lower part of pattern
    j=1;
while(j<i){
    System.out.print(" ");
    j++;
}
j=i;
    while(j<=row){
        System.out.print("*");
        j++;
    }
    i--;
    System.out.print("\n");
}

}
}

When the above code is executed, it produces the following results

Integrated pyramid Star pattern 3

Program 3

import java.util.Scanner;
class DoublePyramidWhile2{
public static void main(String args[]){
    int i,j;  //variable declaration
    Scanner scan=new Scanner(System.in);
//create a scanner object for input

System.out.print("Enter the number of rows: ");
int row=scan.nextInt();   //get input from user for number of rows
i=1;
while(i<=row){  
    j=1;
while(j<=i){     //print upper part of pattern
    System.out.print(" ");
    j++;
}
j=i;
    while(j<=row){
        System.out.print("*"+" ");
        j++;
    }
    i++;
    System.out.print("\n");
}

i=row-1;
while(i>=1){     //print lower part of pattern
    j=1;
while(j<=i){
    System.out.print(" ");
    j++;
}
j=i;
    while(j<=row){
        System.out.print("*"+" ");
        j++;
    }
    i--;
    System.out.print("\n");
}

}
}

When the above code is executed, it produces the following results

Integrated pyramid Star pattern 4

Program 4

import java.util.Scanner;
class DoublePyramidWhile3{
public static void main(String args[]){
    int i,j,k;  //variable declaration
    Scanner scan=new Scanner(System.in);
//create a scanner object for input

System.out.print("Enter the number  of rows: ");
int row=scan.nextInt();    //get input from user for number of rows
i=1;
while(i<=row){   
    j=1;
while(j<=row-i){   //print upper part of pattern
    System.out.print(" ");
    j++;
}
j=1;
    while(j<=i){
        System.out.print("*"+" ");
        j++;
    }
    i++;
    System.out.print("\n");
}

i=1;
while(i<=row-1){     //print lower part of pattern
    j=1;
while(j<=i){
    System.out.print(" ");
    j++;
}
j=1;
    while(j<=row-i){
        System.out.print("*"+" ");
        j++;
    }
    i++;
    System.out.print("\n");
}

}
}

When the above code is executed, it produces the following results

 

integrated pyramid Star pattern 5

Program 5

import java.util.Scanner;
class DoublePyramidWhile4{
public static void main(String args[]){
    int i,j,k;  //variable declaration
    Scanner scan=new Scanner(System.in);
//create a scanner object for input

//get input from the user for rows
System.out.print("Enter the number of rows: ");
int rows=scan.nextInt();   

i=1; 
while(i<=rows){
  for(j=1; j<=i; j++){   //print upper part of pattern
  System.out.print("*");
  
}

j=i*2; 
while(j<rows*2){      //print lower part of pattern
  System.out.print(" ");
   j++;
}

k=i;
while( k>=1){
  System.out.print("*");
   k--;
}

  System.out.print("\n");
  
   i++;

}
}
}

When the above code is executed, it produces the following results

 

integrated pyramid Star pattern 6

Program 6

import java.util.Scanner;
class DoublePyramidWhile5{
public static void main(String args[]){
    int i,j,k;  //variable declaration
    Scanner scan=new Scanner(System.in);
//create a scanner object for input

//get input from the user for rows
System.out.print("Enter the number of rows: ");
int rows=scan.nextInt();

i=rows; 
while(i>=1){  //parent while loop
    j=rows; 
  while(j>=1+rows-i){   //print upper part of pattern
  System.out.print("*");
   j--;
  
}
     j=i*2; 
    while(j<rows*2-1){     
  System.out.print(" ");
  j++;
  
    }

    k=1+rows-i;
    while( k<=rows){   //print lower part of pattern
    if(k!=1)
  System.out.print("*");
 k++;
  
   }

  System.out.print("\n");
  i--;

}
}
}

When the above code is executed, it produces the following results

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