一些Java实验的例子

public class Z4_5 { private boolean isEmpty; private final int size = 10; private int current; private int set[] = new int[size]; public Z4_5() { this.isEmpty = true; this.current = 0; for (int i = 0; i < size; i++) this.set[i] = 0; } public void Clear() { this.isEmpty = true; this.current = 0; for (int i = 0; i < this.size; i++) this.set[i] = 0; } public boolean MergeIntegerSets(Z4_5 arg1, Z4_5 arg2) { if (arg1.isEmpty && arg2.isEmpty) { this.Clear(); return true; } if (arg1.isEmpty == true) { this.isEmpty = false; this.current = arg2.current; for (int i = 0; i < this.size; i++) this.set[i] = arg2.set[i]; return true; } if (arg2.isEmpty == true) { this.isEmpty = false; this.current = arg1.current; for (int i = 0; i < this.size; i++) this.set[i] = arg1.set[i]; return true; } if (arg1.equal(arg2) == true) { this.isEmpty = false; this.current = arg1.current; for (int i = 0; i < this.size; i++) this.set[i] = arg1.set[i]; return true; } Z4_5 tmp = new Z4_5(); tmp.isEmpty = false; tmp.current = this.current; for (int i = 0; i < this.size; i++) tmp.set[i] = this.set[i]; this.isEmpty = false; this.current = arg1.current; for (int i = 0; i < this.size; i++) this.set[i] = arg1.set[i]; for (int i = 0; i < arg2.size; i++) { if (this.isIn(arg2.set[i]) == false) { if (this.current == 10) { System.out.println("IntegerSet Over flow!"); this.isEmpty = false; this.current = tmp.current; for (int j = 0; j < this.size; j++) this.set[j] = tmp.set[j]; return false; } this.InsertElement(arg2.set[i]); } } return true; } public boolean IntersectIntegerSet(Z4_5 arg1, Z4_5 arg2) { if (arg1.isEmpty == true || arg2.isEmpty == true) return true; for (int i = 0; i < this.size; i++) if (arg2.set[i] != 0 && arg1.isIn(arg2.set[i]) == true) this.InsertElement(arg2.set[i]); return true; } public boolean InsertElement(int arg) { if (arg < 20 || arg > 80) { System.out.println("The argument must >20 and <80"); return false; } if (this.isEmpty == true) { this.isEmpty = false; this.current++; this.set[0] = arg; return true; } if (this.current == 10) return false; if (this.isIn(arg) == true) { System.out.println(arg + " is already in the IntegerSet!"); return false; } for (int i = 0; i < this.size; i++) { if (this.set[i] == 0) { this.set[i] = arg; this.current++; return true; } } return false; } public boolean DeleteElement(int arg) { if (arg < 20 || arg > 80) { System.out.println("The argument must >20 and <80"); return false; } if (this.isEmpty == true) return false; else { if (this.isIn(arg) == true) { int pos = size - 1; for (int i = 0; i < size; i++) if (this.set[i] == arg) pos = i; this.current--; if (this.current == 0) this.isEmpty = true; this.set[pos] = 0; return true; } else { System.out.println(arg + " is not in the IntegerSet!"); return false; } } } public boolean valid() { for (int i = 0; i < this.size; i++) { if (this.set[i] == 0) continue; if (this.set[i] < 20 || this.set[i] > 80) return false; } return true; } public boolean equal(Z4_5 arg) { for (int i = 0; i < size; i++) if (this.isIn(arg.set[i]) == false) return false; return true; } public boolean isIn(int arg) { if (this.isEmpty == true) return false; for (int i = 0; i < size; i++) if (arg == set[i]) return true; return false; } public void print() { System.out.print("( "); for (int i = 0; i < this.size; i++) System.out.print(this.set[i] + " "); System.out.print(")\n"); } public static void main(String[] args) { Z4_5 t1 = new Z4_5(); Z4_5 t2 = new Z4_5(); Z4_5 t3 = new Z4_5(); Z4_5 t4 = new Z4_5(); t1.InsertElement(30); t1.InsertElement(33); t1.InsertElement(38); System.out.println("t1"); t1.print(); t2.InsertElement(30); t2.InsertElement(32); t2.InsertElement(38); t2.InsertElement(43); t2.InsertElement(54); System.out.println("t2"); t2.print(); t3.MergeIntegerSets(t1, t2); t3.print(); t4.IntersectIntegerSet(t1, t2); t4.print(); } }