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The source codepackage p; class A implements Bag { int size = 0; Comparable[] elems = new Comparable[10]; /* (non-Javadoc) * @see p.Bag#iterator() */ public java.util.Iterator iterator() { return new Iterator(this); } /* (non-Javadoc) * @see p.Bag#add(java.lang.Comparable) */ public Bag add(Comparable e) { if (this.size + 1 == this.elems.length) { Comparable[] newElems = new Comparable[2 * this.size]; System.arraycopy(this.elems, 0, newElems, 0, this.size); this.elems = newElems; } this.elems[this.size++] = e; return this; } /* (non-Javadoc) * @see p.Bag#addAll(p.Bag) */ public Bag addAll(Bag v1) { java.util.Iterator i = v1.iterator(); for (; i.hasNext(); this.add((Comparable) i.next())); return this; } public void sort() { /* insertion sort */ for (int i = 1; i < this.size; i++) { Comparable e1 = this.elems[i]; int j = i; while ((j > 0) && (this.elems[j - 1].compareTo(e1) > 0)) { this.elems[j] = this.elems[j - 1]; j--; } this.elems[j] = e1; } } } class Iterator implements java.util.Iterator { private int count = 0; private A v2; Iterator(A v3) { this.v2 = v3; } public boolean hasNext() { return this.count < this.v2.size; } public Object next() { return this.v2.elems[this.count++]; } public void remove() { throw new UnsupportedOperationException(); } } class Client { public static void main(String[] args) { A v4 = createList(); populate(v4); update(v4); sortList(v4); print(v4); } static A createList() { return new A(); } static void populate(Bag v5) { v5.add("foo").add("bar"); } static void update(Bag v6) { Bag v7 = new A().add("zap").add("baz"); v6.addAll(v7); } static void sortList(A v8) { v8.sort(); } static void print(Bag v9) { for (java.util.Iterator iter = v9.iterator(); iter.hasNext();) System.out.println("Object: " + iter.next()); } } |
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