Question

I am working on a section of code for an assignment I am doing atm, and I am completely stuck with 1 little bit.

I need to convert the contents of an array list into a string, or the form of a string, which will be able to be imput into toString() in order for it to be printed to the screen.

public String toString(){
    String full;
    full = (this.name + this.address + "\n" + "Student Number = " + this.studentId);
    for (int i = 0; i < cs.size(); i++) {
        full.append(cs[i]);
    return full;

The piece of above code is where i attempt to combine 3 varaibles and the contents of an array list into a single string with formatting.

Unfortunatly it creates an error “The type of the expression must be an array type but it resolved to ArrayList”

Thanks for any help.

Jake

Answer 1

cs is array list, so you have to do get operation, not [] (which is for array access)

It should be like:

full.append(cs.get(i));

Not

full.append(cs[i]);

EDIT: As assylis said, full should be StringBuilder not just String, because String doesn’t support append() method.

StringBuilder full = new StringBuilder();