- Java Basic Programs
- Java Programming Examples
- Java Print Hello World
- Java Get Input from User
- Java Print Integer
- Java Add two Numbers
- Java Check Even or Odd
- Java Check Prime or Not
- Java Check Alphabet or Not
- Java Check Vowel or Not
- Check Reverse equal Original
- Java Fahrenheit to Celsius
- Java Celsius to Fahrenheit
- Java Perfect Number Program
- Java Find Quotient Remainder
- Java Days to Seconds
- Java Count Digits in Number
- Java Binary Number Addition
- Java Discount Program
- Java Compute Courier Charge
- Java Find Telephone Bill
- Java Print ASCII Values
- Java Check Palindrome or Not
- Java Check Armstrong or Not
- Generate Armstrong Numbers
- Add two Numbers using Pointers
- Java Mathematical Programs
- Add Subtract Multiply & Divide
- Java Make Calculator
- Java Add Digits of Number
- Java Check Leap Year or Not
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- Java Find Simple Interest
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- Java Print Fibonacci Series
- Java Find nCr nPr
- Calculate Average & Percentage
- Java Calculate Arithmetic Mean
- Java Calculate Student Grade
- Java Print Table of Number
- Java Print Prime Numbers
- Java Add n Numbers
- Java Interchange two Numbers
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- Java Swap two Numbers
- Count Positive Negative & Zero
- Find Largest of two Numbers
- Find Largest of three Numbers
- Java Find Factorial of Number
- Java Find HCF & LCM
- Area & Perimeter of Square
- Area & Perimeter of Rectangle
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- Java Conversion Programs
- Java Decimal to Binary
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- Java Decimal to Hexadecimal
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- Java Binary to Hexadecimal
- Java Octal to Decimal
- Java Octal to Binary
- Java Octal to Hexadecimal
- Java Hexadecimal to Decimal
- Java Hexadecimal to Binary
- Java Hexadecimal to Octal
- Java Pattern Programs
- Java Pattern of Stars
- Java Pattern of Alphabets
- Java Pattern of Numbers
- Java Pyramid of Stars
- Java Pyramid of Alphabets
- Java Pyramid of Numbers
- Java Print Diamond Pattern
- Java Print Floyd Triangle
- Java Print Pascal Triangle
- Java Array Programs
- One Dimensional Array Program
- Java Linear Search
- Java Binary Search
- Find Largest Element in Array
- Find Smallest Element in Array
- Java Reverse Array
- Insert Element in Array
- Delete Element from Array
- Java Merge two Array
- Java Bubble Sort
- Java Selection Sort
- Java Insertion Sort
- Java Find Common Elements
- Java Count Even/Odd Number
- Two Dimensional Array Program
- Java Add two Matrices
- Java Subtract two Matrices
- Java Transpose Matrix
- Multiply two Matrices
- Three Dimension Array Program
- Java String Programs
- Java Print String
- Find Length of String
- Java Compare two String
- Java Copy String
- Java Concatenate String
- Java Reverse String
- Delete Vowels from String
- Delete Words from Sentence
- Find Occurrence of a Character
- Java Find Occurrence of a Word
- Occurrence of Each Character
- Java Occurrence of Each Word
- Java Count Repeated Characters
- Java Count Repeated Words
- Java Capitalize Each Word
- Java Count Vowels/Consonants
- Java Extract Numbers
- Java Count Word in String
- Remove Spaces from String
- Java Sort a String
- Java Uppercase to Lowercase
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- Java Swap two Strings
- Java Check Anagram or Not
- Java Check Balance Parentheses
- Java Check Password Strength
- Java File Programs
- Java Read File
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- Read & Display File Content
- Java Copy File
- Java Append Text to File
- Java Merge two File
- List files in Directory
- Java Delete File
- Java Miscellaneous Programs
- Generate Random Numbers
- Java Print Time & Date
- Java Get IP Address
- Java Shutdown Computer
- Java Programming Tutorial
- Java Tutorial
Java Program to Print Diamond Pattern
This article covers one of the important pattern program in Java, that is diamond pattern program. The diamond patterns are created here, using stars, numbers, alphabets, and any other desired character.
Print Diamond Pattern of Stars in Java
The question is, write a Java program to print diamond pattern of stars. The program given below is its answer:
public class fresherearth { public static void main(String[] args) { int row=10, i, j, space; for(i=0; i<row; i++) { for(space=i; space<(row-1); space++) System.out.print(" "); for(j=0; j<(i*2)+1; j++) System.out.print("*"); System.out.print("\n"); } for(i=0; i<(row-1); i++) { for(space=i; space>=0; space--) System.out.print(" "); for(j=(row*2)-3; j>(i*2); j--) System.out.print("*"); System.out.print("\n"); } } }
The snapshot given below shows the sample output produced by above Java program on printing of diamond using stars:
Since the program given above prints the diamond pattern of stars, that doesn't match the row size. That is, I've given 10 as the row size, but the diamond pattern is printed with total of (row*2)-1 number of lines or rows. That is, 19 lines in this case.
Therefore, the program needs to be modified. So I've modified the program. Here is the new version of the above program, that does the same job as of previous, but cares about the value of variable row:
public class fresherearth { public static void main(String[] args) { int row=13, i, j, space, decider; decider = row/2; for(i=0; i<row; i++) { if(i<=decider) { for(space=i; space<decider; space++) System.out.print(" "); for(j=0; j<(i*2)+1; j++) System.out.print("*"); System.out.print("\n"); } else { for(space=i; space>decider; space--) System.out.print(" "); for(j=(row*2)-1; j>(i*2); j--) System.out.print("*"); System.out.print("\n"); } } } }
The output produced by this program is:
* *** ***** ******* ********* *********** ************* *********** ********* ******* ***** *** *
Print Diamond Pattern of Given Size using Stars in Java
This program allows user to define the size of diamond, at run-time of the program.
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { int row, i, j, space, decider; Scanner s = new Scanner(System.in); System.out.print("Enter the Row Size: "); row = s.nextInt(); decider = row/2; for(i=0; i<row; i++) { if(i<=decider) { for(space=i; space<decider; space++) System.out.print(" "); for(j=0; j<(i*2)+1; j++) System.out.print("*"); System.out.print("\n"); } else { for(space=i; space>decider; space--) System.out.print(" "); for(j=(row*2)-1; j>(i*2); j--) System.out.print("*"); System.out.print("\n"); } } } }
Here is its sample run with user input 9 as row size, or number of lines, to expand the diamond of stars:
Note - To print diamond pattern, provide only an odd value to the row.
Print Diamond Pattern of Numbers in Java
This program is almost similar to second program. The only difference is, I've used num variable with its value as 1. You can try with any other number too. In this program, first the num variable is declared and initialized. And in the place of *, I've placed the num variable. That's it. Rest of the codes are similar to second program.
public class fresherearth { public static void main(String[] args) { int row=9, i, j, k, d, num=1; d = row/2; for(i=0; i<row; i++) { if(i<=d) { for(k=i; k<d; k++) System.out.print(" "); for(j=0; j<(i*2)+1; j++) System.out.print(num); System.out.print("\n"); } else { for(k=i; k>d; k--) System.out.print(" "); for(j=(row*2)-1; j>(i*2); j--) System.out.print(num); System.out.print("\n"); } } } }
Output of Previous Program on Diamond Pattern using Numbers
1 111 11111 1111111 111111111 1111111 11111 111 1
Print Diamond Pattern of Alphabets in Java
This program is almost similar to previous, as in place of num of int type, to print diamond of numbers, I've used alphabet of char type, to print diamond of alphabet.
public class fresherearth { public static void main(String[] args) { int row=9, i, j, k, d; d = row/2; char alphabet='A'; for(i=0; i<row; i++) { if(i<=d) { for(k=i; k<d; k++) System.out.print(" "); for(j=0; j<(i*2)+1; j++) System.out.print(alphabet); System.out.print("\n"); } else { for(k=i; k>d; k--) System.out.print(" "); for(j=(row*2)-1; j>(i*2); j--) System.out.print(alphabet); System.out.print("\n"); } } } }
Output of Previous Program on Diamond Pattern using Alphabet
A AAA AAAAA AAAAAAA AAAAAAAAA AAAAAAA AAAAA AAA A
Print Diamond Pattern of any Given Character in Java
This is the last program of this article, created to allow user to enter the character to form the diamond using that character. The character can be anything such as 1, 2, R, O, s, b, #, %, }, [ etc.
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { int row=9, i, j, k, d; d = row/2; char ch; Scanner s = new Scanner(System.in); System.out.print("Enter the Character: "); ch = s.next().charAt(0); for(i=0; i<row; i++) { if(i<=d) { for(k=i; k<d; k++) System.out.print(" "); for(j=0; j<(i*2)+1; j++) System.out.print(ch); System.out.print("\n"); } else { for(k=i; k>d; k--) System.out.print(" "); for(j=(row*2)-1; j>(i*2); j--) System.out.print(ch); System.out.print("\n"); } } } }
Here is its sample run with user input $, a dollar sign or character
Same Program in Other Languages
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