Manipulations of int and String in Java

At first, declare a variable as int:

int n = {your number};

To remove a right most digit:

n = n / 10;

To check if right most digit is 8:

n % 10 == 8;

If we declare a String variable:

String str = "Hello, test here.";

The last character of the String can be gotten like this:

String lastChar = str.substring(str.length() - 1);

To remove the last character of the String:

String str = str.substring(0, str.length() - 1);

Get number of characters of the String:

int numOfChars = str.length();

Weird behaviors

This returns 1:

public int returnOne() {
  return 1;
}

But this returns 0. This looks like it would return 1 though..

public int returnOne() {
  int count = 0;
  return count++;
}

But this returns 1.

public int returnOne() {
  int count = 0;
  return ++count;
}