Recently I came across the following definition when preparing for a Java interview:
All executable code executes either within an initializer list or a method.
But from my understanding, Java does not support initializer list as mentioned here
Then why does the author gave a definition like above, when Java does not support initializer list?
I can't speak for that Author, but my understanding is, he/she means Static Initialization Blocks (or) instance blocks. Refer this tutorial for more information on these blocks.
What is should be read as is "Executable code should be within initializer block (static or non static), constructor or a method"
So if System.out.println("executable statement") is our executable statement, then
public class SomeClass{
static{
System.out.println("executable statement");
}
{
System.out.println("executable statement");
}
public SomeClass(){
System.out.println("executable statement");
}
public void someMethod(){
System.out.println("executable statement");
}
}
This is valid code while
public class SomeClass{
System.out.println("executable statement");
}
gives compiler error
