what does the main method do in java code example

Example 1: java main

class myClass {
    public static void main(String[] args) {
        // code
    }
}

Example 2: main method java

public class Test {

public static void main(String[] args){

	System.out.println("Hello World");
	
}
}

Example 3: java main method

public static void main(String args[]){}

Example 4: main method java

public class Test {

static void main(String[] args){

	System.out.println("Hello World");
	
}
}

Example 5: what main method java

It's an execution start point