testcopyarray.java

此源码为机械工业出版社出版的《Java语言程序设计》第三版所配套的书中所有源代码。

// TestCopyArray.java: Demonstrate copying arrays
public class TestCopyArray
{
  // Main method
  public static void main(String[] args)
  {
    // Create an array and assign values
    int[] list1 = {0, 1, 2, 3, 4 ,5};

    // Create an array with default values
    int[] list2 = new int[list1.length];

    // Assign array list to array list2
    list2 = list1;

    // Display list1 and list2
    System.out.println("Before modifying list1");
    printList("list1 is ", list1);
    printList("list2 is ", list2);

    // Modify list1
    for (int i=0; i<list1.length; i++)
      list1[i] = 0;

    // Display list1 and list2 after modifying list1
    System.out.println("\nAfter modifying list1");
    printList("list1 is ", list1);
    printList("list2 is ", list2);
  }

  // The method for printing a list
  public static void printList(String s, int[] list)
  {
    System.out.print(s + " ");
    for (int i=0; i<list.length; i++)
      System.out.print(list[i] + " ");

    System.out.print('\n');
  }
}