Question

How to get the index of the last occurrence of specified character in char array with Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        String str = "c c++ csharp java php python";
        
        char[] arr = str.toCharArray();

        System.out.println(str.lastIndexOf(arr[0])); // 'c'
        
        System.out.println(str.lastIndexOf(arr[9])); // 'a'
        
        System.out.println(str.lastIndexOf(arr[11])); // 'p'
    }
}




/*
run:

6
16
22

*/

 

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Answer 2

import java.util.Arrays;

public class MyClass {
    public static void main(String args[]) {
        char[] arr = {'c', 'c', '+', '+', 'c', 's', 'h', 'a', 'r', 
                      'p', 'j', 'a', 'v', 'a', 'p', 'h', 'p',};
  
        String str = new String(arr);
        
        System.out.println(str);

        System.out.println(str.lastIndexOf(arr[0])); // 'c'
        
        System.out.println(str.lastIndexOf(arr[7])); // 'a'
        
        System.out.println(str.lastIndexOf(arr[9])); // 'p'
    }
}




/*
run:

cc++csharpjavaphp
4
13
16

*/

 

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