Java problems without using normal methods

1) Program to check whether the number is odd or even without using modulo or division operators.

The idea is to subtract 2 from the number until the number is less than 2. If the remaining value is 0, then number is odd, else even.

public class oddeven {

public static void main(String args[])

{

int num =27;

if(odd(num))

System.out.println("ODD");

else

System.out.println("EVEN");

}

public static boolean odd(int num)

{   int temp=num;

while(temp>=2)

temp=temp-2;

if(temp==1)

return true;

else

return false;

}

}

2) Java program to return the maximum of two numbers without using if,while or for.

If 'a' and 'b' are 2 numbers, then the maximum value of a,b is (a+b)/2 + (|a-b|)/2. For one part we need to use floor and for the other part we need to use ceiling.

public class maxnum {

public static void main(String args[])

{

int num1=106;

int num2=121;

int max= findMax(num1,num2);

System.out.println(" Max value = " + max);

}

public static int findMax(int num1,int num2)

{

int diff=Math.abs(num1-num2);

int sum=num1+num2;

double diff1=(double)(diff);

double sum1= (double) (sum);

double result = Math.ceil(sum1/2)+Math.floor(diff1/2);

//double result = Math.ceil(diff1/2) + Math.floor(sum1/2);

int result1=(int)(result);

return result1;

}

}