Unable to get behaviour of Switch case in java

Question

I have written small code in java 6

public class TestSwitch{

public static void main(String... args){
    int a = 1;
    System.out.println("start");
          


        

Answer 1

int a = 1;
System.out.println("start");
switch (a) {
case 1: {
    System.out.println(1);
    break;
}
case 3: {
    System.out.println(3);
    break;
}
case 4: {
    System.out.println(4);
    break;
}
case 2: {
    System.out.println(2);
    break;
}
case 5: {
    System.out.println(5);
    //no break will fall through and print 7 too 
}
case 7: {
    System.out.println(7);
    break;
}
default:{
    System.out.println("none");
}

}