?? test.java
字號:
class Stack
{
private int[] intArr;
private int index;
Stack(int v)
{
intArr = new int[v];
}
public synchronized int top1()
{
return intArr[0];
}
public int top2()
{
synchronized (this) {
return intArr[0];
}
}
public synchronized void push(int val)
{
intArr[index] = val;
index++;
}
public synchronized int pop()
{
index--;
return intArr[index];
}
public synchronized boolean contains(int val)
{
int size = intArr.length;
boolean found = false;
for (int i=0;i<size;i++)
{
if (intArr[i] == val)
{
found = true;
break;
}
}
return found;
}
}
class Test extends Thread
{
private Stack stack;
Test(int v)
{
stack = new Stack(v);
}
public static void main(String args[])
{
int val=Integer.parseInt(args[0]);
Test t = new Test(val);
long start = System.currentTimeMillis();
for (int i=0;i<val;i++)
t.stack.top1();
long end = System.currentTimeMillis();
System.out.println("top1 " + (end-start));
start = System.currentTimeMillis();
for (int i=0;i<val;i++)
t.stack.top2();
end = System.currentTimeMillis();
System.out.println("top2 " + (end-start));
}
}
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