Hollow Rhombus star pattern program in Java|Java patterns

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Hollow Rhombus star pattern program in Java|Java patterns

In this article, we will discuss the Hollow Rhombus star pattern program in Java

We can display many types of number, star, Alphabet, Binary patterns using for.while and do-while loop in Java language

In this post, we are going to learn how to print Hollow Rhombus Pattern using for, while and do-while loop in Java language,

Note – Here,To create a Hollow Rhombus pattern, you can use either star or any symbol as you wish

Code to display Rhombus pattern using for loop

This program allows the user to enter the number of rows with any symbols then the program displays the Hollow Rhombus pattern using for loop in Java language

Program 1

//program to print Hollow rhombus star pattern
import java.util.Scanner;
public class HolloWRhombusStar1{//class declaration
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
  //create a scanner object for input
  
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter character as you wish: ");
//Ask input from the user as character
char ch=scan.next().charAt(0);
//Store the character entered by user
System.out.print("\n");
for(int i=1; i<=rows; i++){//outer for loop 
   for(int j=1; j<=rows-i; j++){//inner for loop 
   System.out.print(" ");//print space
   }
   for(int j=1; j<=rows; j++){//inner for loop
   if(i==1 || i==rows || j==1 || j==rows){
   System.out.print(ch);//print symbol after space
   }
   else{
       System.out.print(" ");//print space
   }
}
 System.out.print("\n");//move to next line
}
}
}

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

Code to display Rhombus pattern using while loop

This program allows the user to enter the number of rows with any symbols then the program displays the Hollow Rhombus pattern using while loop in Java language

Program 2

//program to print Hollow rhombus star pattern
import java.util.Scanner;
public class HolloWRhombusStar2{//class declaration
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
  //create a scanner object for input
  
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter character as you wish: ");
//Ask input from the user as character
char ch=scan.next().charAt(0);
//Store the character entered by user
System.out.print("\n");
int i=1;
while(i<=rows){//outer while loop 
int j=1; 
   while(j<=rows-i){//inner while loop 
   System.out.print(" ");//print space
    j++;
   }
   j=1;
   while(j<=rows){//inner while loop
   if(i==1 || i==rows || j==1 || j==rows){
   System.out.print(ch);//print symbol after space
   }
   else{
       System.out.print(" ");//print space
   }
    j++;
}
 System.out.print("\n");//move to next line
  i++;
}
}
}

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

Code to display Rhombus pattern using do-while loop

This program allows the user to enter the number of rows with any symbols then the program displays the Hollow Rhombus pattern using do-while loop in Java language

Program 1

//program to print Hollow rhombus star pattern
import java.util.Scanner;
public class HolloWRhombusStar3{//class declaration
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
  //create a scanner object for input
  
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter character as you wish: ");
//Ask input from the user as character
char ch=scan.next().charAt(0);
//Store the character entered by user
System.out.print("\n");
int i=1;
do{//outer do-while loop 
int j=0; 
  do{//inner do-while loop 
   System.out.print(" ");//print space
    j++;
   } while(j<=rows-i);
   j=1;
   do{//inner do-while loop
   if(i==1 || i==rows || j==1 || j==rows){
   System.out.print(ch);//print symbol after space
   }
   else{
       System.out.print(" ");//print space
   }
    j++;
}while(j<=rows);
 System.out.print("\n");//move to next line
  ++i;
}while(i<=rows);
}
}

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