- Java Basic Programs
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- Java Print Hello World
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- Java Check Prime or Not
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- 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
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- Java Compute Courier Charge
- Java Find Telephone Bill
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- Java Check Palindrome or Not
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- Generate Armstrong Numbers
- Add two Numbers using Pointers
- Java Mathematical Programs
- Add Subtract Multiply & Divide
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- Java Print Fibonacci Series
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- Calculate Average & Percentage
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- Java Print Table of Number
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- Java Add n Numbers
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- Count Positive Negative & Zero
- Find Largest of two Numbers
- Find Largest of three Numbers
- Java Find Factorial of Number
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- Java Conversion Programs
- Java Decimal to Binary
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- Java Octal to Binary
- Java Octal to Hexadecimal
- Java Hexadecimal to Decimal
- Java Hexadecimal to Binary
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- 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
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- Find Largest Element in Array
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- Insert Element in Array
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- Java Merge two Array
- Java Bubble Sort
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- Java Insertion Sort
- Java Find Common Elements
- Java Count Even/Odd Number
- Two Dimensional Array Program
- Java Add two Matrices
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- Java Transpose Matrix
- Multiply two Matrices
- Three Dimension Array Program
- Java String Programs
- Java Print String
- Find Length of String
- Java Compare two String
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- Java Concatenate String
- Java Reverse String
- Delete Vowels from String
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- Find Occurrence of a Character
- Java Find Occurrence of a Word
- Occurrence of Each Character
- Java Occurrence of Each Word
- Java Count Repeated Characters
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- Java Capitalize Each Word
- Java Count Vowels/Consonants
- Java Extract Numbers
- Java Count Word in String
- Remove Spaces from String
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- Java Uppercase to Lowercase
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- Java Swap two Strings
- Java Check Anagram or Not
- Java Check Balance Parentheses
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- List files in Directory
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- 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 CodesCracker { 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 CodesCracker { 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 CodesCracker { 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 CodesCracker { 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 CodesCracker { 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 CodesCracker { 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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