SOURCE CODE FILES FOR Primitive EXAMPLES 
        Variables, Operators

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 * Project Variables
 * Class Main
 *
 * Illustrate the use of variables in Java.
 */

public class Main
{
    public static void main(String[] args)
    {
        // Integer variables.
        int x, y = 34, z;
        x = -21;
        z = 372639;
        System.out.println(x + " " + y + " " + z);

        // Floating point variables.
        double a, b = 387.68574;
        a = -9.24;
        System.out.println(a + " " + b);

        // Character variables.
        char s = 'P', t = '#', u;
        u = '4';
        System.out.println(s + " " + t + " " + u);

        // Boolean variables.
        boolean f, g;
        f = true;
        g = false;
        System.out.println(f + " " + g);
    }
}
// Output:
-21 34 372639
-9.24 387.68574
P # 4
true false

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/**
 * Project Operators
 * Class Main
 *
 * Illustrate some of the Java operators.
 */

public class Main
{
    public static void main(String[] args)
    {
        // Arithmetic operators
        // Remember the precedence of operations.
        int x = 3, y = 8, z = 12, w;
        w = x + y * z - 7;
        System.out.println(x + " " + y + 
            " " + z + " " + w);

        // String concatenation
        String m = "dog", n = "cat", k;
        k = n + m;
        System.out.println(m + " " + n + " " + k);

        // Comparison operators
        boolean f, g;        
        f = (x >= y - 4);
        g = (2 * z == y);
        System.out.println(f + " " + g);

        // Logical operators
        f = true && false;
        g = (1 == 2) || (5 == 5);
        System.out.println(f + " " + g);

        // Assignment operators
        x += y;
        y *= (2 + z);
        w /= 3;
        System.out.println(x + " " + y + 
            " " + z + " " + w);
    }
}

// Output:
3 8 12 92
dog cat catdog
false false
false true
11 112 12 30

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