英文:
How could I get my program to check if a word is a palindrome irrespective of the case entered by the user
问题
import java.util.Scanner;
public class Pailindrome {
public static void main(String[] args) {
Scanner sc1 = new Scanner(System.in);
System.out.println("Please enter a word");
String ori = sc1.nextLine();
isPailindrome(ori);
if (isPailindrome(ori))
System.out.println(ori + " is a Palindrome");
else
System.out.println(ori + " is NOT a Palindrome");
}
public static boolean isPailindrome(String ori) {
ori = ori.toLowerCase(); // Convert input to lowercase
int i = 0;
int j = ori.length() - 1;
while (i < j) {
if (ori.charAt(i) != ori.charAt(j)) {
return false;
}
i++;
j--;
}
return true;
}
}
英文:
import java.util.Scanner;
public class Pailindrome {
public static void main(String[] args) {
Scanner sc1 = new Scanner(System.in);
System.out.println("Please enter a word");
String ori = sc1.nextLine();
isPailindrome(ori);
if (isPailindrome(ori))
System.out.println(ori + "is a Pailindrome");
else
System.out.println(ori + "is NOT a Pailindrome");
}
public static boolean isPailindrome(String ori) {
int i = 0;
int j = ori.length() - 1;
while (i < j) {
if (ori.charAt(i) != ori.charAt(j)) {
return false;
}
i++;
j--;
}
return true;
}
}
The code works perfectly I'm just confused how I will get it to work irrespective of the case
inputted by the user. For example aBba is a palindrome but It says it's not in the code I've done. I
would like any help if possible thanks.
答案1
得分: 3
将输入内容传入 toUpper() 函数；这样，当你检查是否为回文时，所有字符都将转换为大写。
String ori = scr.nextLint();
if (isPalindrome(ori.toUpperCase()))
//做一些操作
英文:
Take the input and call toUpper(); that way when you check to see if it is a palindrome, all of the characters are uppercase.
String ori = scr.nextLint();
if(isPalindrome(ori.toUpperCase()))
//do something
答案2
得分: 3
你可以在开始处理之前将所有字母转换为小写。
你可以编写自己的函数或使用 toLowerCase() 字符串函数。
import java.util.Scanner;
public class Pailindrome {
public static void main(String[] args) {
Scanner sc1 = new Scanner(System.in);
System.out.println("请输入一个单词");
String ori = sc1.nextLine();
ori = ori.toLowerCase();
isPalindrome(ori);
if (isPalindrome(ori)) {
System.out.println(ori + "是一个回文");
} else {
System.out.println(ori + "不是一个回文");
}
}
public static boolean isPalindrome(String ori) {
int i = 0;
int j = ori.length() - 1;
while (i < j) {
if (ori.charAt(i) != ori.charAt(j)) {
return false;
}
i++;
j--;
}
return true;
}
}
英文:
You can convert all of the letters to lowerCase before you start the processing.
You can write your own function or use toLowerCase() String function.
import java.util.Scanner;
public class Pailindrome {
public static void main(String[] args) {
Scanner sc1 = new Scanner(System.in);
System.out.println("Please enter a word");
String ori = sc1.nextLine();
ori = ori.toLowerCase();
isPailindrome(ori);
if (isPailindrome(ori))
}
System.out.println(ori + "is a Pailindrome");
} else {
System.out.println(ori + "is NOT a Pailindrome");
}
}
public static boolean isPailindrome(String ori) {
int i = 0;
int j = ori.length() - 1;
while (i < j) {
if (ori.charAt(i) != ori.charAt(j)) {
return false;
}
i++;
j--;
}
return true;
}
答案3
得分: 1
convert all the cases to lowercase/uppercase before checking the palindrome
isPailindrome(ori.toLowerCase());
英文:
Convert all the cases to lowercase/uppercase before checking the palindrome
isPailindrome(ori.toLowerCase());
答案4
得分: 1
从两端放大并根据需要调整大小。
public static boolean isPalindrome(String str) {
int len = str.length();
for (int i = 0; i < len >> 1; i++) {
if (Character.toLowerCase(str.charAt(i)) !=
Character.toLowerCase(str.charAt(len - i - 1))) {
return false;
}
}
return true;
}
英文:
Zoom in from both ends and adjust the case as required.
public static boolean isPalindrome(String str) {
int len = str.length();
for (int i = 0; i < len >>1; i++) {
if (Character.toLowerCase(str.charAt(i)) !=
Character.toLowerCase(str.charAt(len - i - 1))) {
return false;
}
}
return true;
}
</details>
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