class One {
    int a; 
    static int b;
    void fun(One other) {
	this.a = this.a + 2; 
        other.a = other.a + 3; 
	One.b = One.b + 1; 
        System.out.println
          (this.a + " " + other.a + " " + One.b); 
    } 
    public static void main(String[] args) {
	One potato = new One(); 
	One tomato = new One(); 
        tomato.fun(potato); 
        tomato.fun(potato); 
        tomato.fun(tomato); 
        potato.fun(potato); 
        potato.fun(tomato); 
        tomato.fun(new One()); 
        (new One()).fun(potato); 
        (new One()).fun(new One()); 
    }
}

lh102sun.cs.indiana.edu%javac One.java
lh102sun.cs.indiana.edu%java One
2 3 1
4 6 2
9 9 3
11 11 4
13 12 5
14 3 6
2 16 7
2 3 8
lh102sun.cs.indiana.edu%

class Two {
    public static void main(String[] args) {
	System.out.println(2 / 3 + " " + 2 % 3); 
        System.out.println(('A' - 'C') * 10 % 8); 
        int x = 1, y = 1; 
        if (x > 2) { y = 2; y = y + 1; } else y = y + 1; 
        System.out.println(y); 
        if (x < 2)  y = 2; else y = y + 1; y = y - 1;
        System.out.println(y); 
        for (int i = -7; i <= 12; i = i + 4) 
          System.out.print("?");
  	  System.out.println("!");  
	for (int i = -12; i <= 6; i = i + 9) {
          System.out.print("?");
  	  System.out.println("!"); 
        } 
        if (false) x = 2; else if (true) x = 3; else x = 1; 
        if (x == 3) System.out.println("How are you?"); 
        System.out.println("Not bad..."); 
        for (int i = 0; i < 3; i++) {
	    x = x + y; y = x - y; x = x - y; 
            System.out.println("(" + x + ", " + y + ")"); 
        } 
        if (false && false || true) 
          System.out.println("Good bye!"); 
    }
}

lh102sun.cs.indiana.edu%javac Two.java
lh102sun.cs.indiana.edu%java Two
0 2
-4
2
1
?????!
?!
?!
?!
How are you?
Not bad...
(1, 3)
(3, 1)
(1, 3)
Good bye!
lh102sun.cs.indiana.edu%

class Three {
    public static void main(String[] args) {
	int x = 3 % 5, y = 5 / 3; 
        while (x >= 0 || y >= 0 && (y - x) < 100) {
	    x = x / 3 - 7 * y; 
	    y = 3 * y - 2 / x; 
            System.out.println("(" + x + ", " + y + ")"); 
	}
        Three tomato = new Three(); 
        Three potato = new Three(1);
        for (potato.fun(); tomato.a * Three.b < 6; 
                           tomato.fun()) {
	    potato.nuf(); 
            tomato.nuf(); 
            x = x + 1;
	}
    }
    int a; 
    static int b; 
    void fun() {
	this.a = this.a + 1; 
	Three.b = Three.b - 2; 
        System.out.println("(" + a + ", " + b + ")"); 
    }
    void nuf() {
        this.a = this.a - 2; 
        Three.b = Three.b + 1; 
        System.out.println("(" + a + ", " + b + ")"); 
    }
    Three() {
	System.out.println("-----------------------"); 
    }
    Three(int value) { this.a = value; } 
}

lh102sun.cs.indiana.edu%javac Three.java
lh102sun.cs.indiana.edu%java Three
(-6, 3)
(-23, 9)
(-70, 27)
(-212, 81)
-----------------------
(2, -2)
(0, -1)
(-2, 0)
(-1, -2)
(-2, -1)
(-3, 0)
(-2, -2)
(-4, -1)
(-4, 0)
(-3, -2)
lh102sun.cs.indiana.edu%

class Four {
    public static void main(String[] args) {
	System.out.println(false && true); 
	System.out.println(true && (false || true)); 
	System.out.println(! (true || false)); 
	System.out.println(! (false && true)); 
	System.out.println(! true && (false || ! true)); 
	System.out.println
          (! (false && (! true || false))); 
	System.out.println(
          ! (false && (! true || ! (true && ! false)))); 
        for (int i = 0; i < 5; i++) {
            Four.fun(i); 
	    System.out.println(); 
	}
    }
    static void fun(int x) {
	if (x > 0) System.out.print(x + 1);
        else if (x > 1) System.out.print(x);
             if (x > 2) System.out.print(x - 1);
        else if (x > 3) System.out.print(2 * x);
        else System.out.print(x * x);
    }
}

lh102sun.cs.indiana.edu%javac Four.java
lh102sun.cs.indiana.edu%java Four
false
true
false
true
false
true
true
0
21
34
42
53
lh102sun.cs.indiana.edu%

class Five {
    public static void main(String[] args) {
        for (int i = 0; i < 10; i++) {
	    System.out.println(Five.fun(i)); 
	}
    }
    static int fun(int x) {
	if (x % 2 == 0) return (x + 1);
        else if (x % 3 == 1) return (x);
        if (x % 5 == 2) return (x - 1);
        else if (x > 3) return (x);
        else return (2 * x);
    }
}

lh102sun.cs.indiana.edu%javac Five.java
lh102sun.cs.indiana.edu%java Five
1
1
3
6
5
5
7
7
9
9
lh102sun.cs.indiana.edu%