Kharin S.A.

Regional Municipal Higher Educational Institution

"Institute of Business "Strategy", Ukraine

Study of parameterized programming techniques

in Java

Dynamic operation of the mining industry is a prerequisite for effective economic development. The problem of the reconstruction of production facilities in the face of large depths development should be accompanied by intensive efforts in the direction of research aimed at the improvement of all processes that require the appropriate automation to ensure reliability of results.

Analysis of previously published research results and the current state of the practice of design and construction of mining points to the need for greater use of computer technology for a detailed account of the various features of the construction of underground facilities and optimal parameters of reference works.

Perform the analysis of various types of programs that use parameterized constructors and methods and develop effective software to study questions of the organization underground development. In modern conditions is an urgent development of research methods, the corresponding software, which would serve as tools for studying the organization of construction issues. We consider the problem of determining the rate of construction of mines using the following programs written in Java (Table. 1, Fig. 1-5).

Table 1

The programs used to calculate the parameters of penetration organization workings

№	Type of program
1	Program, consisting of a method within a class
2	Program, which includes a method that returns the speed
3	The program uses a parameterized method
4	The class uses a parameterized constructor
5	Constructor for conflict resolution namespace

Program, which includes a method inside a class (see Fig. 1), characterized by sufficient simplicity. Consider the following two lines of code: myboxl.volume () and mybox2.volume (). The first line includes a method volume () object myboxl. Thus, the reference to myboxl.volume () displays the development of ROP, a certain variable myboxl, and appeal to mybox2.volume () shows the development of ROP, a certain variable mybox2. When a myboxl.volume (), the runtime system passes control to Java code specified in a method volume () .After as operators within the volume () executed, control returns to the calling routine, and work continues with the line of code following the call. Our method - a way to implement the routines in the language Java. Another way to implement the method volume () is that it calculates the rate of penetration of development and returns the results to the calling program (see Fig. 2). Consider line vol=myboxl.volume (). When you call the volume (), it is moved to the right of the assignment operator. On the left is a variable vol, which will take the value returned by volume ().

Fig. 1 program, consisting of a method within a class

When using the method with the parameters occurs generalization of the method. Parameterized method can operate on a data set. Very useful when determining the rate of penetration of developments to create a method that takes a measurement of the speed of its parameters and sets each instance variable. This concept is implemented following program Fig. 3 Clearly, the method setDim () is used to set the rate of penetration of each generation. When creating copies is sometimes difficult to initialize all variables in the class. As the requirements of the initialization are fairly common, Java allows initialization of objects at the moment of their creation. This automatic initialization is performed by using a constructor. The constructor initializes the object after it is created. Parameterized constructors allow you to create objects with different data. The next version of the object (see Fig. 4) defines a constructor that sets the ROP generation through its parameters.

Fig. 2 Program, which includes a method that returns the speed

In some cases, the method it is necessary to refer to the object that caused it. To do this, Java defines the keyword this. It can be used in any method, refer to the current object. That is to say this - this is a reference to the object whose method was invoked. As you know, Java is unacceptable posting two local variables with the same name within the same scope or comprising identifiers. When a local variable has the same name as an instance variable, the local variable hides the instance variable. Since this allows you to access directly to the object, it can be used to resolve any namespace conflicts that might occur between the instance and local variables. Below is the other version of the program for calculating the rate of penetration generation (see Fig. 5), which uses, for example, Tms and luh for parameter names and for those applying this, to access the instance variables with te¬mi same names, for example, this .Tms = Tms or this.luh = luh.

Analysis of comparable tasks performed fragments of programs for calculating the rate of penetration of developments by number signs reflected in Fig. 6 It is clear that the smallest number of them is characterized by 5 version of the program presented by the designer with the keyword this. However, these programs are at risk of committing a software error during initialization of variables. On this factor looks very simple program acceptable version 1, which includes a method in a class that is not too much greater than the number of characters in version 5.

Fig. 3 The program uses a parameterized method	Fig. 4 Box uses a parameterized class designer

Fig. 5 Designer for permission namespace conflicts	Fig. 6 Analysis of fragments of programs by number signs

The study developed and analyzed a number of computer programs for the automation issues study the organization of mine construction in the Java language in the IDE Eclipse, using parameterized methods.