What is the meaning of fall through in java language?

Answer 1

A "fall through" is what we call it when a case in a switch statement doesn't end in a break, return, throw, or any other control-breaking statement. In these cases, program execution continues to the next case block (regardless of the value in the switch), and so control "falls through" to the case below it.

Here is an example of a typical switch block:

switch(n) {

case 0:

System.out.println("zero");

break;

case 1:

System.out.println("one");

case 2:

System.out.println("two");

break;

}

Notice the break statements in cases 0 and 2. These are used to break out of the switch block so that only one value is printed out. If n is set to 1 before executing this code, "one" would be printed out and then the program would continue to the next statement and print out "two" as well. That is a fall through.