The method of the fifth day (method) and heavy (overload)
1. The special flow control statements
（1）break
break action: break or loop or switch statement; disruption from the break is the most recent cycle.
Break tagged: go along with the label would be finished, break which label on which interrupt the cycle.
（2）continue
continue action: When interrupt cycles, the cycle time of execution continues; interrupts is the nearest distance continue when cycles.
Continue tagged: go along with the label on the end, which continue the cycle when the cycles which label is interrupted.
【Exercise】
(1) break find all the prime numbers less than 100;
(2) receiving a n, so that should have 100 cycles of the cycle, the actual let loop n times;
(3) print the odd-numbered less than 100 (using Continue) (difficulty) ;
Continue (.
2. Methods
(1) Statement
Methods: The behavior of the class or object, capsulation function, in order to perform certain functions.
Precautions: The method can only be defined in a class, and other methods may not be nested !!!
Statement format:
modifier return type method name (a data type parameter 1, parameter data type 2 2, ...) {
statement block;
return value return;
}
Description:
Return Value Type: Data Type method of final results, if the method does not return void value on the use of
the method name: identifier
in the form of parameters: the method requires some data, specific data is not sure how much, but how much specific data no effect on the function
return value: the results of products of the process, and finally to the user if the method does not return a value, you can omit the final return.
the actual parameters: when the user is really using this method of data transfer
method = method signature (method using a manual API) + method body (code actually executed)
(2) call
The method is called only will be executed
Method call statement: the method name (argument 1, argument 2, ...);
After receiving the return value of the method call completes
Method call itself can be seen as a return value, so you can directly use the variable that receives the return value
Return Value Type = variable name method call;
【Exercise】
(1) TestMethod a defined class, method call a method in the main method main, rectangular printout 20 * 8;
(2) Printing a rectangular perimeter
3. Overload
In the same class, the same method name, a list of different parameters (different parameters), called reload.
Lists reflect the different parameters: number of different parameters, different types of parameters, different parameters order.
Note: the type of method overloading and returns the value regardless of the override function is generally similar to the method.
Overloaded benefits: ease of use caller only need to remember a method name.
4. Analysis of transmission parameters
-------- arguments "parameter
Note: The argument only to the argument that was passed is a copy of the argument, it does not affect the parameter.
5. unity, a chain transfer
For example: print a special rectangle: square
[Practice] to use to print squares and rectangles
6. call execution process analysis method
The method of execution is equivalent to a stack: last-out, the return value is stored in the temporary memory space.
7. recursive (method calls itself)
(1) infinite recursion -> stack overflow -> java.lang.StackOverloadError
[Practice] to print using a recursive factorial 5
(2) application scenario: a problem can be decomposed subproblems of the same type.
8. Analysis of double recursion
9. The cross-category method call
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10. [work] to do a project (Bank Accounting)
