array length in java

To find the length of an array, use array data member 'length' 'length' gives the number of elements allocated, not the number inserted Write a class with a main method that creates an array of 10 integers and totals them up The elements of an array can be of any type, including a programmer-defined class

For a String array created using new String[3], each element would contain null b length is the number of elements in array b In this case, b length is 3 Note that 

Arrays are objects in Java ○ Even a public instance variable: length – Range of positions: 0 length-1 – Length is fixed after created (instantiated) ○ Declare 

and the number of elements is called the length of the array It is much easier to create arrays of a fixed, predetermined size • Java makes it easy to initialize 

Creating an Array type[] name = new type[length]; int[] numbers = new int[5]; index 0 1 2 3 4 value 0 0 0 0 0 Java automatically initializes elements to 0

length, just as we modified the standard traversing loop The first element of the array will always be at index 0, so the first line of code doesn't need to change

InitArray java Line 8 Declare array as an array of ints Line 10 Create 10 ints for array; each int is initialized to 0 by default Line 15 array length returns length of

length of the array passed in, it will work for any size array that we pass in Example Array Code Here is code that iterates over a non-empty array to find the index 

for (int i = 0; i < myList length; i++) // the loop assigns 0 to myList[0] myList[i] = i; // 1 to myList[1] and 9 to myList[9] 6 2 5 Array Initializers ▫ Java has a