NullArgumentToVariableArgMethod.java

package com.siyeh.igtest.bugs.null_argument_to_variable_arg_method;

public class NullArgumentToVariableArgMethod {
    public void foo(String[] ss)
    {
        String.format("%s", <warning descr="Confusing argument 'null', unclear if a varargs or non-varargs call is desired">null</warning>);
        String.format("%d", 1);
        String.format("%s", <warning descr="Confusing argument 'ss', unclear if a varargs or non-varargs call is desired">ss</warning>);

        CompletableFuture[] futures = {};
        CompletableFuture.allOf(futures);
    }
}
class CompletableFuture<T> {
    public static CompletableFuture<Void> allOf(CompletableFuture<?>... cfs) {
        return null;
    }
}
class X {
    void a() {
        String[] array = {"one", "two"};
        final String join = join(" ", array);
    }

    public static String join(CharSequence delimiter, CharSequence... elements) {
        return "";
    }
}