In this example, you use a lambda expression to create a parameter, which is passed to a print statement: $ java. Stream methods are well documented in Java docs, but to mimic the basic example of the for loop it makes sense to use the forEach or forEachOrdered method, which iterates over each element in the Stream. What you do with the Stream depends on what you want to achieve. Those two steps are broadly typical of Stream usage: You have data, so you put the data into a Stream so you can analyze it. Then you create a stream called myStream and put the data from your array into it. In the code, you create an Array as usual. In this sample code, you import the library for access to the Stream construct, and to move an array into the Stream. Set the stop value to c myStream = Arrays.stream(myArray) Start your counter (call it c) at 0 because Java starts the index of arrays at 0. The increment you want the counter to advanceįor instance, suppose you have three items, and you want Java to process each one. An "item" can be a number, or it can be a table containing several entries, or any Java data type. For loopĪ for loop takes a known quantity of items and ensures that each item is processed. Another option for Java is the Stream method. How do you write code that can adapt to unique use cases? In many languages, Java included, one option is the for loop. But how do you know how many images there are? One user might have five images, and another might have 100. For instance, you might write code to resize an image until all images have been resized once. You use control structures to direct the flow of a program, and the way you tell your code what to do is by defining a condition that it can test. In programming, you often need your code to iterate over a set of data to process each item individually.
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