arrayisnotiterable.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 20 行

//: holding/ArrayIsNotIterable.java
import java.util.*;

public class ArrayIsNotIterable {
  static <T> void test(Iterable<T> ib) {
    for(T t : ib)
      System.out.print(t + " ");
  }
  public static void main(String[] args) {
    test(Arrays.asList(1, 2, 3));
    String[] strings = { "A", "B", "C" };
    // An array works in foreach, but it's not Iterable:
    //! test(strings);
    // You must explicitly convert it to an Iterable:
    test(Arrays.asList(strings));
  }
} /* Output:
1 2 3 A B C
*///:~