publicbooleanisPalindromeUsingStringBuilder(String text){Stringclean=text.replaceAll("\\s+","").toLowerCase();StringBuilderplain=newStringBuilder(clean);StringBuilderreverse=plain.reverse();return(reverse.toString()).equals(clean); }publicbooleanisPalindromeUsingStringBuffer(String text){Stringclean=text.r...
private static boolean isPalindrome(String str) { if (str == null) return false; StringBuilder strBuilder = new StringBuilder(str); strBuilder.reverse(); return strBuilder.toString().equals(str); } 1. 2. 3. 4. 5. 6. 7. 假设面试官让你不使用任何其他类来实现的话,我们只需要首尾一一对...
import java.util.function.Predicate; public class Main { public static void main(String[] args) { // Define the palindrome check lambda expression Predicate < String > isPalindrome = str -> { String reversed = new StringBuilder(str).reverse().toString(); return str.equals(reversed); }; /...
public static boolean isPalindrome(String s){ return s.equals(new StringBuilder(s).reverse().toString()); } public static void palindromeNum(){ //1221是一个非常特殊的数,它从左边读和从右边读是一样的,编程求所有这样的四位十进制数。 for (int i= 0; i < 10; i++) { for (int j = 0...
Write a Java function to find the longest palindrome in a given string. A string can contain palindrome substrings within it. Learn more about how tofind the longest palindrome substring in a string. What are the differences betweenString,StringBuffer, andStringBuilderin Java?
String s1 = "Java"; s1 = "Python"; In above code snippet, we can say that s1 value got changed and it’s a String object. So how can we say that String is immutable? The most important point to understand is how Strings get created in java. When we create a String using string...
“race a car” is not a palindrome. Note: Have you consider that the string might be empty? This is a good question to ask during an interview. For the purpose of this problem, we define empty string as valid palindrome. 这道题没什么难的,就是考细心和对java的熟悉了,从两头往中间数,碰...
3. 类StringBuilder:http://docs.oracle.com/javase/7/docs/api/java/lang/StringBuilder.html (1)append(char c) Appends the string representation of thecharargument to this sequence. returnStringBuilder (2)toString() Returns a string representing the data in this sequence. ...
The interviewees may ask you to write various ways to reverse a string, or they might ask you to reverse a string without using built-in methods, or they might even ask you to reverse a string using recursion. There are occasions where it is simpler to write problems involving regular exp...
split(" "); // Spilt String by Space StringBuilder sb = new StringBuilder(); int count=0; for(String s:strarray){ if(!s.equals("")){ count++; } } return count; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter String ...