Referencing class fields When initializing a class field, it’s legal to initialize it to the value of a previously initialized class field. For example, Listing 3 initializes y to x ‘s value.

Looking at our example, we see that we declared a new class called Animal that defines three methods: isAMammal, isCarnivorous, and getHello.

For example, a bad guy in a computer game might well be an object. This bad guy has variables (movement speed, health, sprites) and it has methods (shoot, move left, move right, explode).

Good object-oriented design sometimes takes a back seat to a need to get things done, and the single responsibility model gets thrown out the window. Then, out of nothingness, the God object emerges.

Java string object example In Java, a string is an object that represents a number of character values. Each letter in the string is a separate character value that makes up the Java string object.