Insert Dimensions to complete Expression/ReferenceType

Question

I\'m a newbie to Java.

I have provided a short snippet from my code for BFS.

public int bfs(Person p, Person q) {
    private HashMap

        

Answer 1

First I would suggest you start reading a Java tutorial...

https://docs.oracle.com/javase/tutorial/java/TOC.html

For your issues specifically:

• https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
• https://docs.oracle.com/javase/tutorial/java/javaOO/objectcreation.html
• https://docs.oracle.com/javase/tutorial/java/javaOO/variables.html

As for your code, you can initialize your variables right when you declare them:

    Map marked = new HashMap();
    int count = 0; // or whatever initial value