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-rw-r--r--Year_3/TSDWL/ex_20131219/MainThread.java17
-rw-r--r--Year_3/TSDWL/ex_20131219/Shared.java10
-rw-r--r--Year_3/TSDWL/ex_20131219/Thread1.java31
-rw-r--r--Year_3/TSDWL/ex_20131219/Thread2.java31
4 files changed, 89 insertions, 0 deletions
diff --git a/Year_3/TSDWL/ex_20131219/MainThread.java b/Year_3/TSDWL/ex_20131219/MainThread.java
new file mode 100644
index 0000000..ea62871
--- /dev/null
+++ b/Year_3/TSDWL/ex_20131219/MainThread.java
@@ -0,0 +1,17 @@
+public class MainThread {
+ public static void main(String[] args) {
+ Shared mem = new Shared();
+ Thread1 t1 = new Thread1(mem);
+ Thread2 t2 = new Thread2(mem);
+
+ t1.start();
+ t2.start();
+
+ try {
+ t1.join();
+ t2.join();
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ }
+ }
+}
diff --git a/Year_3/TSDWL/ex_20131219/Shared.java b/Year_3/TSDWL/ex_20131219/Shared.java
new file mode 100644
index 0000000..18976c5
--- /dev/null
+++ b/Year_3/TSDWL/ex_20131219/Shared.java
@@ -0,0 +1,10 @@
+public class Shared {
+ private int m;
+
+ public Shared() {
+ m = (int) (Math.random() * (11-1+1)+1);
+ }
+
+ synchronized public void set(int val) { m = val; }
+ synchronized public int get() { return m; }
+}
diff --git a/Year_3/TSDWL/ex_20131219/Thread1.java b/Year_3/TSDWL/ex_20131219/Thread1.java
new file mode 100644
index 0000000..b9f8d84
--- /dev/null
+++ b/Year_3/TSDWL/ex_20131219/Thread1.java
@@ -0,0 +1,31 @@
+public class Thread1 extends Thread {
+ private Shared mem;
+
+ public Thread1(Shared mem) {
+ super();
+ this.mem = mem;
+ }
+
+ public void run() {
+ int xrand;
+ int m;
+ while (true) {
+ synchronized(mem) {
+ m = mem.get();
+ if (m >= 1 && m <= 5) {
+ xrand = (int) (Math.random() * (10-1+1)+1);
+ System.out.printf("Thread 1: (%d, %d)\n", m, xrand);
+ mem.set(xrand);
+ mem.notifyAll();
+ } else {
+ try {
+ mem.wait();
+ } catch(InterruptedException e) {
+ e.printStackTrace();
+ break;
+ }
+ }
+ }
+ }
+ }
+}
diff --git a/Year_3/TSDWL/ex_20131219/Thread2.java b/Year_3/TSDWL/ex_20131219/Thread2.java
new file mode 100644
index 0000000..152e9e0
--- /dev/null
+++ b/Year_3/TSDWL/ex_20131219/Thread2.java
@@ -0,0 +1,31 @@
+public class Thread2 extends Thread {
+ private Shared mem;
+
+ public Thread2(Shared mem) {
+ super();
+ this.mem = mem;
+ }
+
+ public void run() {
+ int xrand;
+ int m;
+ while (true) {
+ synchronized(mem) {
+ m = mem.get();
+ if (m >= 6 && m <= 10) {
+ xrand = (int) (Math.random() * (10-1+1)+1);
+ System.out.printf("\t\t\tThread 2: (%d, %d)\n", m, xrand);
+ mem.set(xrand);
+ mem.notifyAll();
+ } else {
+ try {
+ mem.wait();
+ } catch(InterruptedException e) {
+ e.printStackTrace();
+ break;
+ }
+ }
+ }
+ }
+ }
+}