Where is the error?

Question about the task

Path update

Java Syntax, Level 10, Lesson 5

Resolved

pls reply

Implement the changePath(String, String) method so that it replaces the jdk version in the path passed in the first method parameter with the version passed in the second parameter, and returns the new path.
The JDK version starts with "jdk" and ends at "/".

Example:
path - "/usr/java/jdk1.8/bin"
JDK version - "jdk-13"
The changePath(path, JDK version) method should return the path "/usr/java/jdk-13/bin".

The main() method is not involved in testing.

Requirements:

The changePath(String, String) method needs to be implemented as outlined in the task conditions.

package en.codegym.task.pro.task09.task0914; /* Path update */ public class Solution { public static void main(String[] args) { String path = "/usr/java/jdk1.8/bin"; String jdk13 = "jdk-13"; System.out.println(changePath(path, jdk13)); } public static String changePath(String path, String jdk) { //write your code here int a=path.lastIndexOf("jdk1.8"); int b = path.lastIndexOf("/",16); String sub = path.substring(a,b); path =path.replace(sub, jdk); return path; } }

Comments (2)

Popular
New
Old

You must be signed in to leave a comment

Joel

Level 25 , Portugal

18 August 2023, 00:13

solution

int b = path.lastIndexOf("/",16); the problem is that you gave the index exactly before the "/". if you count here "/usr/java/jdk5/bin" , the last index before "/" is 13. that's why is worng. You should do this: int b = path.lastIndexOf("/", a); oh and lastly, you should change int a=path.lastIndexOf("jdk1.8"); to int a=path.lastIndexOf("jdk"); otherwise, you are only changing the "jdk1.8" and not the "jdk5 or "jdk-8" and so on. You should find something in common, this expression "jdk" is common in every path.

Guadalupe Gagnon

Level 37 , Tampa, United States

16 August 2023, 15:57

This code only passed one of my test:

System.out.println(changePath("/usr/java/jdk1.8/bin", "jdk-13")); // pass
System.out.println(changePath("/usr/java/jdk5/bin", "jdk-8")); // fail
System.out.println(changePath("/usr/java/jdk-8/bin", "jdk11")); // fail
System.out.println(changePath("/usr/java/jdk11/bin", "jdk-13.4")); // fail
System.out.println(changePath("/usr/java/jdk-13.4/bin", "jdk-15")); // fail
System.out.println(changePath("/usr/java/jdk-15/bin", "jdk-15.8")); // fail
System.out.println(changePath("/usr/java/jdk-15.8/bin", "jdk-17")); // fail

It should have output the correct change in each.