From the course: Java Object-Oriented Programming
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Building objects with a constructor - Java Tutorial
From the course: Java Object-Oriented Programming
Building objects with a constructor
- [Instructor] Classes only represent a general blueprint but they become more tangible when you use a constructor to bring your blueprint to life. To create trees from our tree class we'll need to add a special type of function called a constructor to construct our tree objects. To create a constructor, we'll use the class name tree. We don't need a return type because the name of the function, tree, counts as the return type as well, since tree is the class name. This classifies it as a constructor. To build a tree we'll need to know what its height, diameter and tree type should be. This means we'll need to add inputs to the constructor so that we can construct a custom tree with the appropriate height, diameter and type. Of course, the body of the function doesn't do anything yet. We'll need to set up the tree we're building with the appropriate values. Using the, this keyword, we access the tree we're in the midst of creating, and set the height, trunk and type on the left equal…
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Contents
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Using classes as blueprints4m
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Building objects with a constructor2m 48s
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Using concrete instances for application logic4m 32s
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Understanding the difference between class and instance members4m 54s
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Exploring a built-in Java class4m 5s
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Challenge: Build an employee class1m 8s
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Solution: Build an employee class3m 11s
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