Java第二章补充 数组ppt课件

1、 5.6 4.5 3.3 13.2 4 34.33 34 45.45 99.993 11123 double myList = new double10; myList reference myList0 myList1 myList2 myList3 myList4 myList5 myList6 myList7 myList8 myList9 Element value Array reference variable Array element at index 5 0 1 2 3 4 0 7 0 1 2 3 4 1 2 3 4 0 1 2 3 4 matrix21 = 7; matri

2、x = new int55; 3 7 0 1 2 0 1 2 int array = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ; 1 2 3 4 5 6 8 9 111 x x0 x1 x2 x00 x01 x02 x03 x10 x11 x12 x13 x20 x21 x22 x23 x.length is 3 x0.length is 4 x1.length is 4 x2.length is 4 C o n ten ts o f list1 list1 C o n ten ts o f list2 list2 B efo re th e assig n

3、 m en t list2 = list1 ; C o n ten ts o f list1 list1 C o n ten ts o f list2 list2 A fter th e assig n m en t list2 = list1 ; G arb ag e C o n ten ts o f list1 list1 C o n ten ts o f list2 list2 B efo re th e assig n m en t list2 = list1 ; C o n ten ts o f list1 list1 C o n ten ts o f list2 list2 A f

4、ter th e assig n m en t list2 = list1 ; G arb ag e Anonymous arrayJava uses pass by value to pass parameters to a method. There are important differences between passing a value of variables of primitive data types and passing arrays. For a parameter of a primitive type value, the actual value is pa

5、ssed. Changing the value of the local parameter inside the method does not affect the value of the variable outside the method. For a parameter of an array type, the value of the parameter contains a reference to an array; this reference is passed to the method. Any changes to the array that occur inside