Use Vector in java.util
import java.util.Vector;
public class VectorBenchmark1 {
public static final int MaxSize = 100000;
public static final int NTRIES = 10;
public static void main(String[] args) {
Vector v = new Vector();
long start = System.currentTimeMillis();
for (int i = 0; i < MaxSize; i++)
v.add(new Integer(i));
long end = System.currentTimeMillis();
System.out.println("Allocating vector elements: " + (end - start)
+ " milliseconds");
Integer[] integerArray = new Integer[1];
start = System.currentTimeMillis();
for (int i = 0; i < MaxSize; i++) {
if (i >= integerArray.length) {
Integer[] b = new Integer[i * 2];
System.arraycopy(integerArray, 0, b, 0, integerArray.length);
integerArray = b;
}
integerArray[i] = new Integer(i);
}
end = System.currentTimeMillis();
System.out.println("Allocating array elements: " + (end - start)
+ " milliseconds");
start = System.currentTimeMillis();
for (int j = 0; j < NTRIES; j++)
for (int i = 0; i < MaxSize; i++) {
Integer r = (Integer) v.get(i);
v.set(i, new Integer(r.intValue() + 1));
}
end = System.currentTimeMillis();
System.out.println("Accessing vector elements: " + (end - start)
+ " milliseconds");
start = System.currentTimeMillis();
for (int j = 0; j < NTRIES; j++)
for (int i = 0; i < MaxSize; i++) {
Integer r = integerArray[i];
integerArray[i] = new Integer(r.intValue() + 1);
}
end = System.currentTimeMillis();
System.out.println("Accessing array elements: " + (end - start)
+ " milliseconds");
}
}
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