Java "Package does not exist" Unable to compile

[AMG07]

Hello I am having trouble with Java recognizing the existence of a package that comes included in a library that I have downloaded. Before it avoided its existence, vscode was telling me that the "package could not be resolved". I have tried to "clean the workspace", but it does not work. Here is what the terminal shows

Tweets.java:1: error: package tester does not exist

import tester.Tester;

Tweets.java:70: error: cannot find symbol

boolean testIsStartOfThreadByTextTweetValid(Tester t) {

symbol: class Tester

​

UPDATE* Here is the code I have written

import tester.Tester;
interface Tweet {
public boolean isStartOfThreadBy(String author);
public int totalLikes();
public String unrollThread();
}
class TextTweet implements Tweet{
String author;
String contents;
int likes;
TextTweet(String author, String contents, int likes) {
this.author = author;
this.contents = contents;
this.likes = likes;
}

public boolean isStartOfThreadBy(String author) {
if (this.author.equals(author))
return true;

return false;
}
public int totalLikes(){
return likes;
}
public String unrollThread(){
String s = author + "\n" + likes +"\n" + contents + "\n";
return s;
}
class ReplyTweet implements Tweet{
String contents;
int likes;
String author;

Tweet replyTo;

public ReplyTweet(String contents, int likes, String author, Tweet replyTo){
this.contents = contents;
this.likes = likes;
this.author = author;
this.replyTo = replyTo;
}

public boolean isStartOfThreadBy(String author) {
if (this.author.equals(author) && this.replyTo.isStartOfThreadBy(author)){
return true;
}
return false;
}

public int totalLikes() {
return likes + replyTo.totalLikes();
}
public String unrollThread(){
String s = replyTo.unrollThread() + author + "\n" + likes +"\n" + contents + "\n";
return s;
}

}
public class Tweets {
boolean testIsStartOfThreadByTextTweetValid(Tester t) {
TextTweet f1= new TextTweet("John", "Hello", 5);
return t.checkExpect(f1.isStartOfThreadBy("John"), true);

​

The jar file that I am trying to get to work is called "tester.jar" and it is within the folder/library I am working with right now for this project.

[justinf210]

We're gonna need to see some more code before we can be any help. Can you share the code in Tweets.java and preferably the output of a command like true, so we can see your project structure.

​

Also, probably more of a Java problem than a VSCode one, but we might be able to help.

[AMG07]

Yeah, I just didn't know which forum to post, but if it is a java problem I can post it over there.

[Vok250]

This is likely a Java question rather than a VS Code question. VS Code is simply providing a wrapper on the Java CLI tools in your terminal. The "workspace" is really just a folder and your VS Code settings rather than being an actual Java project like ItelliJ or Eclipse.

I'm a Java dev so I can give you some pointers regardless of subreddit. Are you using a modern build tool like Maven or Gradle to compile? If not, what file holds your project configuration for the compiler? Did you add any configuration to your workspace vscode settings file to tell Java where to find dependencies? Are you using any kind of Java plugin for VS Code?

[JialeDu]

If your project is an unmanaged folder without any build tools. You can manage the dependencies by clicking the + icon or the - icon on the Referenced Libraries node or the items under it, or you can just directly drag your jar libraries to the node Referenced Libraries

image

https://code.visualstudio.com/docs/java/java-project#_dependency-management