how to write function in java code example

Example 1: java how to define a function

//declare a function like this:
void function(int parameter1)
{
	//function body
}
//call the function like this:
function(1);

Example 2: what is a method example in java

public int addNum(int num1, int num2) {
  total = num1 + num2;
  System.out.println("Total: " + total);
}