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In this noncompliant code example, overloading variable arity methods makes it unclear which definition of the displayBooleans() method is invoked.:
| Code Block | ||
|---|---|---|
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class Varargs {
private static void displayBooleans(boolean... bool) {
System.out.print("Number of arguments: " + bool.length + ", Contents: ");
for (boolean b : bool)
System.out.print("[" + b + "]");
}
private static void displayBooleans(boolean bool1, boolean bool2) {
System.out.println("Overloaded method invoked");
}
public static void main(String[] args) {
displayBooleans(true, false);
}
}
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When run, this program output:outputs
| Code Block |
|---|
Overloaded method invoked |
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To avoid overloading variable arity methods, use distinct method names to ensure that the intended method is invoked, as shown in this compliant solution.:
| Code Block | ||
|---|---|---|
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class Varargs {
private static void displayManyBooleans(boolean... bool) {
System.out.print("Number of arguments: " + bool.length + ", Contents: ");
for (boolean b : bool)
System.out.print("[" + b + "]");
}
private static void displayTwoBooleans(boolean bool1, boolean bool2) {
System.out.println("Overloaded method invoked");
System.out.println("Contents: [" + bool1 + "], [" + bool2 + "]");
}
public static void main(String[] args) {
displayManyBooleans(true, false);
}
}
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