関連ワード:  java program to check unique number    write a java program to check special number    java program to check number is prime or not    java program to check number is even or odd    java program to check number is palindrome or not    java program to check number is positive or negative    java program to check number is positive negative or zero    java program to check number is armstrong or not    java program to check number is palindrome    java program to check armstrong number