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cgi scripting cgi scripting Creating Arrays There are three steps to creating an array, declaring it, allocating it and initializing it. Declaring Arrays Like other variables in Java, an array must have a specific type like byte, int, String or double. Only variables of the appropriate type can be stored in an array. You cannot have an array that will store both ints and Strings, for instance.Like all other variables in Java an array must be declared.

cgi scripting When you declare an array variable you suffix the type with [] to indicate that this variable is an array. Here are some examples:int[] k; float[] yt; String[] names; In other words you declare an array like you'd declare any other variable except you append brackets to the end of the variable type.Allocating Arrays Declaring an array merely says what it is. It does not create the array. To actually create the array (or any other object) use thenew operator.

cgi scripting When we create an array we need to tell the compiler how many elements will be stored in it. Here's how we'd create the variables declared above:k = new int[3]; yt = new float[7]; names = new String[50]; The numbers in the brackets specify the dimension of the array; i.e. how many slots it has to hold values. With the dimensions above k can hold three ints, yt can hold seven floats and names can hold fifty Strings.

cgi scripting Therefore this step is sometimes called dimensioning the array. More commonly this is called allocating the array since this step actually sets aside the memory in RAM that the array requires.This is also our first look at the new operator. new is a reserved word in java that is used to allocate not just an array, but also all kinds of objects. Java arrays are full-fledged objects with all that implies.

cgi scripting

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