Expressions - The Java Language Specification - page 536

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!");