shell server

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shell server shell server You declare a method's return type in its method declaration. Within the body of the method, you use the statement to return the value. Any method declared doesn't return a value. It does not need to contain a statement, but it may do so. In such a case, a statement can be used to branch out of a control flow block and exit the method and is simply used like this: return; If you try to return a value from a method that is declared , you will get a compiler error.

shell server Any method that is not declared must contain a statement with a corresponding return value, like this: return returnValue; The data type of the return value must match the method's declared return type; you can't return an integer value from a method declared to return a boolean. The class that was discussed in the sections on objects returns an integer: // a method for computing the area of the rectangle public int getArea() { return width * height; } This method returns the integer that the expression evaluates to. method returns a primitive type. A method can also return a reference type. For example, in a program to manipulate objects, we might have a method like this: public Bicycle seeWhosFastest(Bicycle myBike, Bicycle yourBike, Environment env) { Bicycle fastest; // code to calculate which bike is faster, given // each bike's gear and cadence and given // the environment (terrain and wind) return fastest; } If this section confuses you, skip it and return to it after you have finished the lesson on interfaces and inheritance.

shell server When a method uses a class name as its return type, such as does, the class of the type of the returned object must be either a subclass of, or the exact class of, the return type. Suppose that you have a class hierarchy in which is a subclass of , which is in turn a subclass of , as illustrated in . Now suppose that you have a method declared to return a : public Number returnANumber() { ...

shell server

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shell server