A Java Warmup Exercise

In-Class Exercise 1: Which of the following statements about Java are FALSE?

Java is interpreted and never compiled.

There are two different types of comments, block comments and line comments, e.g.

      /* This is a comment that spills
         over to the next line  */

      int i = 5;     /// This is an inline comment.

A char variable occupies 1 byte.

The following cast is permissible:

    long j = 10;
    int i = (long) j;

Except for for-loop variables, all local variables must be declared at the top of a method, e.g.,

    void computeStuff ()
    {
        int k = 5;
        int s = 0;

        for (int i=0; i< i++) {
           int m = 3;                // Will this compile?
           s = k + i*m;
        }
    }

The following are valid String declarations:

    String hello = "hello";
    String world = new String ("world");

The following is a valid array declaration and assignment:
```
    int[] A = new[10];
  
```
A static method that returns nothing must declare the return type as null
The return type is one of several aspects of a method's signature.

It is possible to combine assignment and boolean testing as follows:

        boolean flag;
        
        if (flag = true) {
           // ...
        }

Java does not support call-by-reference parameters.
The package java.lang is the only package that does not need an explicit import statement.

In-Class Exercise 2: Download and modify this Java program print out patterns that look like this (when N=5):