String atau nombor dikatakan sebagai palindrom jika ia kekal sama walaupun selepas ia diterbalikkan. Sebagai contoh, 'MADAM' ialah rentetan palindrom kerana ia dieja 'MADAM' walaupun ia diterbalikkan. Tetapi dalam kes 'LUCKY', rentetan ini bukan palindrom kerana ia adalah 'YKCUL' apabila ia diterbalikkan. Beberapa nombor palindrom ialah 365563, 48984, 12321, 171, 88, 90009, 343, dan beberapa rentetan palindrom ialah MADAM, MALAYALAM, LOL, DAD, MOM, C++&++C, dsb.Mari kita lihat logik dan pelaksanaan palindrom dalam bahagian berikut. Dalam topik ini, kita akan belajar tentang Palindrom di Jawa.
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Untuk menyemak sama ada nombor adalah palindrom, algoritma berikut boleh digunakan.
Sebagai contoh, mari kita ambil nombor 353 sebagai input.
353-> temp
Reversednumber: rev=353
Jika mereka sama, maka nombor itu dikatakan sebagai nombor palindrom.
Jika tidak, nombor itu bukan nombor palindrom.
iaitu
If(inputnum==rev) { then palindrome } Else not palindrome
Terdapat beberapa kaedah untuk menyemak sama ada nombor input yang diberikan adalah palindrom atau tidak.
Mari kita lihat setiap satu daripada mereka secara terperinci:
Kod:
//Java program to check whether a String is a Palindrome or not using For Loop import java.util.*; public class PalindromeNumberExample { //main method public static void main(String[] args) { int r=0 ; //reversed Integer int rem, num; //remainder and original number Scanner s = new Scanner(System.in); System.out.print("Enter number that has to be checked:"); num = s.nextInt(); //Store the number in a temporary variable int temp = num; //loop to find the reverse of a number for( ;num != 0; num /= 10 ) { rem = num % 10; // find the modulus of the number when divided by 10 r = r * 10 + rem; } //check whether the original and reversed numbers are equal if (temp == r) { System.out.println(temp + " is input number"); System.out.println(r + " is the reversed number"); System.out.println("Since they are equal " + temp + " is a palindrome number"); } else { System.out.println(temp + " is input number"); System.out.println(r + " is the reversed number"); System.out.println("Since they are not equal " + temp + " is not a palindrome number"); } } }
Output 1:
Di sini, kerana 353 adalah sama apabila diterbalikkan, ia dianggap sebagai palindrom.
Output 2:
Di sini, kerana 234 kekal tidak sama apabila diterbalikkan, ia tidak dianggap sebagai palindrom.
Kod:
//Java program to check whether a number is a Palindrome or not using While Loop import java.util.*; public class PalindromeNumberExample { public static void main(String[] args) { int r=0, rem, num; Scanner s = new Scanner(System.in); System.out.print("Enter number that has to be checked:"); num = s.nextInt(); //Store the number in a temporary variable int temp = num; //loop to find the reverse of a number while( num != 0 ) { rem= num % 10; r= r * 10 + rem; num=num/10; } //check whether the original and reversed numbers are equal if (temp == r) { System.out.println(temp + " is input number"); System.out.println(r + " is the reversed number"); System.out.println("Since they are equal " + temp + " is a palindrome number"); } else { System.out.println(temp + " is input number"); System.out.println(r + " is the reversed number"); System.out.println("Since they are not equal " + temp + " is not a palindrome number"); } } }
Output 1:
Output 2:
Kod:
//Java program to check whether a String is a Palindrome or not using Library method import java.util.*; public class PalindromeNumberExample { //Function to check whether the string is palindrome or not public static void PalindromeCheck(String str) { // reverse the input String String rev = new StringBuffer(str).reverse().toString(); // checks whether the string is palindrome or not if (str.equals(rev)) { System.out.println("input string is :" + str); System.out.println("Reversed string is :" + rev); System.out.println("Since the input and reversed string are equal, "+ str +" is a palindrome"); } else { System.out.println("input string is :" + str); System.out.println("Reversed string is :" + rev); System.out.println("Since the input and reversed string are not equal, "+ str +" is not a palindrome"); } } public static void main (String[] args) { PalindromeCheck("MALAYALAM"); } }
Output:
Di sini, rentetan input dihantar dalam program itu sendiri.
Untuk menyemak sama ada rentetan ialah palindrom, atur cara berikut juga digunakan.
Kod:
//Java program to check whether a String is a Palindrome or not import java.util.*; public class PalindromeNumberExample { public static void main(String args[]) { String st, rev = ""; Scanner sc = new Scanner(System.in); System.out.println("Enter the string that has to be checked:"); st = sc.nextLine(); int len = st.length(); //length of the string for ( int i = len- 1; i >= 0; i-- ) rev = rev + st.charAt(i); if (st.equals(rev)) { System.out.println("input string is :" + st); System.out.println("Reversed string is :" + rev); System.out.println("Since the input and reversed string are equal, "+ st +" is a palindrome"); } else { System.out.println("input string is :" + st); System.out.println("Reversed string is :" + rev); System.out.println("Since the input and reversed string are not equal, "+ st +" is not a palindrome"); } } }
Output:
Sesuatu nombor dikatakan palindrom jika ia kekal sama walaupun ia diterbalikkan. Palindrom boleh disemak dalam rentetan juga. Beberapa nombor palindrom dan rentetan ialah MOM, MALAYALAM, DAD, LOL, 232, 1331, dsb. Dalam dokumen ini, beberapa aspek Palindrom diliputi, seperti algoritma, kaedah, pelaksanaan, dsb.
Atas ialah kandungan terperinci Palindrom di Jawa. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!
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