[英]I am trying to check for Anagram
Why the code is showing me the error for missing return statement?为什么代码向我显示缺少 return 语句的错误?
What I am trying to do is check the length of the string followed by its content and compare both of them.我想要做的是检查字符串的长度,然后是其内容并比较它们。
import java.util.Scanner;
public class Solution {
static boolean isAnagram(String a, String b) {
char[] arr1 = a.toLowerCase().toCharArray();
char[] arr2 = b.toLowerCase().toCharArray();
java.util.Arrays.sort(arr1);
java.util.Arrays.sort(arr2);
if (arr1.length != arr2.length) {
if (!arr1.equals(arr2)) {
System.out.println("Not Anagrams");
}
return false;
} else if (arr1.equals(arr2)) {
System.out.println("Anagrams");
return true;
}
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String a = scan.next();
String b = scan.next();
scan.close();
boolean ret = isAnagram(a, b);
System.out.println((ret) ? "Anagrams" : "Not Anagrams");
}
}
PRIMARY QUESTION主要问题
You need to have a "return" outside if statements.
您需要在 if 语句之外有一个“返回”。
else if(arr1.equals(arr2))
{
System.out.println("Anagrams");
return true;
}
return false; //add this here. I tested, error goes after this.
}
Tested here - https://onlinegdb.com/S188-FdGL在这里测试 - https://onlinegdb.com/S188-FdGL
EXTRA额外的
Your Anagram logic is wrong.
你的字谜逻辑是错误的。
The correct logic should be like this (follow comments to understand).
正确的逻辑应该是这样的(按照评论来理解)。
import java.util.Scanner;
import java.util.Arrays;
public class Solution {
static boolean isAnagram(String a, String b)
{
char[] arr1 = a.toLowerCase().toCharArray();
char[] arr2 = b.toLowerCase().toCharArray();
int n1 = arr1.length;
int n2 = arr2.length;
// If length is different, then they cannot be Anagram
if (n1 != n2) return false;
// Sort the Character Arrays
Arrays.sort(arr1);
Arrays.sort(arr2);
// Compare each characters of sorted Character Arrays,
// if any character mismatches, it is not an Anagram
for (int i = 0; i < n1; i++)
if (arr1[i] != arr2[i])
return false;
// If all characters of both character Arrays are same,
// only then, the String are Anagrams, so return true
return true;
// Also, remove the print statements from this method,
// as you are already printing in the main method,
// so it creates duplicate prints
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String a = scan.next();
String b = scan.next();
scan.close();
boolean ret = isAnagram(a, b);
System.out.println( (ret) ? "Anagrams" : "Not Anagrams" );
}
}
Tested here - https://onlinegdb.com/rJe-OEtuGL在这里测试 - https://onlinegdb.com/rJe-OEtuGL
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