• public final class Vector2 extends java.lang.Object

• public final class Vector2 { private double x; private double y; private String name;
• Q1
• 

public java.lang.String toString() Returns a string representation of the vector. The string is the name of the vector, followed by the comma separated components of the vector inside parentheses. Overrides: toString in class java.lang. Object Returns: a string representation of the vector public boolean similarTo (Vector2 other, double tol) Determines if two vectors are almost equal (similar). Two vectors are similar if the magnitude of their vector difference is smaller than the specified tolerance. Parameters: other - the other vector to compare tol - the threshold length of the vector difference (this - other) Returns: true if the length of (this - other) is less than tol, and false otherwise