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Operating-System-Lab/Threads/LAB2_1.java at main · ishan-gupt/Operating-System-Lab · GitHub
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LAB2_1.java
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LAB2_1.java
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// Java program for the above approach
import
java
.
util
.
Scanner
;
public
class
LAB2_1
{
static
int
factorial
(
int
n
) {
if
(
n
==
0
)
return
1
;
else
return
(
n
*
factorial
(
n
-
1
));
}
// Starting counter
int
counter
=
1
;
// Function to print odd numbers
public
void
printOddNumber
(
int
N
) {
synchronized
(
this
) {
// Print number till the N
while
(
counter
<
N
) {
// If count is even then print
while
(
counter
%
2
==
0
) {
// Exception handle
try
{
wait
();
}
catch
(
InterruptedException
e
) {
e
.
printStackTrace
();
}
}
// Print the number
System
.
out
.
println
(
"T1 "
+
factorial
(
counter
) +
" "
);
// Increment counter
counter
++;
// Notify to second thread
notify
();
}
}
}
// Function to print even numbers
public
void
printEvenNumber
(
int
N
) {
synchronized
(
this
) {
// Print number till the N
while
(
counter
<
N
) {
// If count is odd then print
while
(
counter
%
2
==
1
) {
// Exception handle
try
{
wait
();
}
catch
(
InterruptedException
e
) {
e
.
printStackTrace
();
}
}
// Print the number
System
.
out
.
println
(
"T2 "
+
factorial
(
counter
) +
" "
);
// Increment counter
counter
++;
// Notify to 2nd thread
notify
();
}
}
}
// Driver Code
public
static
void
main
(
String
[]
args
) {
Scanner
sc
=
new
Scanner
(
System
.
in
);
// Given Number N
System
.
out
.
println
(
"Enter the number"
);
int
N
=
sc
.
nextInt
();
// Create an object of class
LAB2_1
mt
=
new
LAB2_1
();
// Create thread t1
Thread
t1
=
new
Thread
(
new
Runnable
() {
public
void
run
() {
mt
.
printEvenNumber
(
N
);
}
});
// Create thread t2
Thread
t2
=
new
Thread
(
new
Runnable
() {
public
void
run
() {
mt
.
printOddNumber
(
N
);
}
});
// Start both threads
t1
.
start
();
t2
.
start
();
}
}
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