#ex4: demo1
javac E.java
java E 
java E xxx
java E 1
java E 11
java E 21
java E 31
java E 41

exit

OUTPUT

Must specify an argument
Must specify an integer argument
x is OK with 1
main caught E1: x cannot handle 11
y is OK with 21
main caught E2: y cannot handle 31
main caught E1: x caught E3 and threw E1: y cannot handle 41