Even or Odd number and large and small in array in java

Calculate Rectangle Perimeter

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader; 

public class CalculateRectPerimeter

{

public static void main(String[] args)

{               

int width = 0;

int length = 0;                         

try

{

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));                    

System.out.println("Please enter length of a rectangle");

length = Integer.parseInt(br.readLine());

System.out.println("Please enter width of a rectangle");

width = Integer.parseInt(br.readLine());

                        

}

catch(NumberFormatException ne)

{

System.out.println("Invalid value" + ne);

System.exit(0);

}

catch(IOException ioe)

{

System.out.println("IO Error :" + ioe);

System.exit(0);

}

int perimeter = 2 * (length + width);               

System.out.println("Perimeter of a rectangle is " + perimeter);

}             

}

Even Odd Number

public class FindEvenOrOddNumber

{

public static void main(String[] args)

{          

int[] numbers = new int[]{1,2,3,4,5,6,7,8,9,10};             

for(int i=0; i < numbers.length; i++)

{

if(numbers[i]%2 == 0)

System.out.println(numbers[i] + " is even number.");

else

System.out.println(numbers[i] + " is odd number.");                           

   }               

  }

}

Find Largest and Smallest Number in an Array

public class FindLargestSmallestNumber

{ 

public static void main(String[] args)

{

int numbers[] = new int[]{32,43,53,54,32,65,63,98,43,23};

int smallest = numbers[0];

int largetst = numbers[0];             

for(int i=1; i< numbers.length; i++)

{

if(numbers[i] > largetst)

largetst = numbers[i];

else if (numbers[i] < smallest)

smallest = numbers[i];                       

}                 

System.out.println("Largest Number is : " + largetst);

System.out.println("Smallest Number is : " + smallest);

   }

}