function meaning in java code example

Example 1: function in java

public class Main
{
    static void function(){
        System.out.println("I am a function!");
    }
	public static void main(String[] args) {
		function();
	}
}

Example 2: java how to define a function

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