jls15_36.java

class IndexThrow extends RuntimeException { }
class RightHandSideThrow extends RuntimeException { }
class IllustrateCompoundArrayAssignment {
	static String[] strings = { "Simon", "Garfunkel" };
	static double[] doubles = { Math.E, Math.PI };
	static String[] stringsThrow() {
		throw new ArrayReferenceThrow();
	}
	static double[] doublesThrow() {
		throw new ArrayReferenceThrow();
	}
	static int indexThrow() { throw new IndexThrow(); }
	static String stringThrow() {
		throw new RightHandSideThrow();
	}
	static double doubleThrow() {
		throw new RightHandSideThrow();
	}
	static String name(Object q) {
		String sq = q.getClass().getName();
		int k = sq.lastIndexOf('.');
		return (k < 0) ? sq : sq.substring(k+1);
	}
	static void testEight(String[] x, double[] z, int j) {
		String sx = (x == null) ? "null" : "Strings";
		String sz = (z == null) ? "null" : "doubles";
		System.out.println();
		try {
			System.out.print(sx + "[throw]+=throw => ");
			x[indexThrow()] += stringThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sz + "[throw]+=throw => ");
			z[indexThrow()] += doubleThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sx + "[throw]+=\"heh\" => ");
			x[indexThrow()] += "heh";
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sz + "[throw]+=12345 => ");
			z[indexThrow()] += 12345;
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sx + "[" + j + "]+=throw => ");
			x[j] += stringThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sz + "[" + j + "]+=throw => ");
			z[j] += doubleThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sx + "[" + j + "]+=\"heh\" => ");
			x[j] += "heh";
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print(sz + "[" + j + "]+=12345 => ");
			z[j] += 12345;
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
	}
	public static void main(String[] args) {
		try {
			System.out.print("throw[throw]+=throw => ");
			stringsThrow()[indexThrow()] += stringThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[throw]+=throw => ");
			doublesThrow()[indexThrow()] += doubleThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[throw]+=\"heh\" => ");
			stringsThrow()[indexThrow()] += "heh";
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[throw]+=12345 => ");
			doublesThrow()[indexThrow()] += 12345;
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[1]+=throw => ");
			stringsThrow()[1] += stringThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[1]+=throw => ");
			doublesThrow()[1] += doubleThrow();
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[1]+=\"heh\" => ");
			stringsThrow()[1] += "heh";
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		try {
			System.out.print("throw[1]+=12345 => ");
			doublesThrow()[1] += 12345;
			System.out.println("Okay!");
		} catch (Throwable e) { System.out.println(name(e)); }
		testEight(null, null, 1);
		testEight(null, null, 9);
		testEight(strings, doubles, 1);
		testEight(strings, doubles, 9);
	}
}