28 lines
678 B
Java
28 lines
678 B
Java
package puzzle;
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import java.util.Arrays;
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public final class LongArrayList {
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private long[] a;
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private int size;
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public LongArrayList(int initialCapacity) {
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if (initialCapacity < 0) throw new IllegalArgumentException();
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a = new long[initialCapacity];
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}
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public int size() { return size; }
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public void add(long v) {
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if (size == a.length) grow();
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a[size++] = v;
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}
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private void grow() {
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int newCap = a.length == 0 ? 1 : a.length * 2;
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long[] n = new long[newCap];
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System.arraycopy(a, 0, n, 0, size);
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a = n;
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}
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public long[] toArray() { return Arrays.copyOf(a, this.size); }
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} |