Category Archive for: Migrating from C+tto Java

Deconstruct versus Finalization

Deconstruct versus Finalization When you move from C++ to Java, one of the more subtle, yet important issues you will face is the difference between a C++ constructor a Java finalize() method. Although similar in many respects, their actual operation is distinctively different. Let’s. begin by reviewing the purpose and effect of n c++ destruction and the…

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Converting C++ Multiple Inhertance Hierarchies

Converting C++ Multiple Inheritance Hierarchies In both cases, subclass C inherits classes A and U. However, in the hierarchy on the left, C Inherits both A and B at the same time. In the one on the right, Inherits A,  B. By not allowing the inheritance of multiple base classes by a single subclass, Java Safety simplifies the Inheritance…

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Converting Default Arguments

Converting Default Arguments One extensively used feature of c++ that Java docs not support is default  unction arguments. For example, tile areal ) function shown in the following c++ program computes the area of a rectangle if called with two arguments, 01′ the area of a square if called with one argument. As Connolly see, when are…

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Converting C++ Abstract Classes into java Interface

Converting C++ Abstract Classes into java Interface One of the most innovative aspects of Java is the interface. As explained earlier in this book, an interface specifies the form of its various methods without specifying any implementation details. Each class that implements In interface does so by creating the actual methods declared by the interface. Thus, in Java…

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c++ Reference Parameters Versus Java Reference Parameters

c++ Reference Parameters Versus Java Reference Parameters In the preceding section, you saw an example of a C++ program that used a pointer parameter. In Java, this became a reference parameter. Of course, C++ also supports reference parameters. As mentioned, most pointer parameters found in C++ code are simply holdovers from C. Nearly all new C++ code will…

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Converting Pointers that Operate’ on Arrays

Converting Pointers that Operate’ on Arrays Conceptually, converting C++-style pointer-based array accessing into the  equivalent java-compatible array indexing is straightforward-simply substitute the appropriate array-indexing statements. However, in practice this may require some thought. ” Pointer-based array accessing can be a bit difficult to follow, because the normal C++ coding style encourages rather dense, complex expressions. For example, this…

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Eliminating Pointer

Eliminating Pointer When you convert a c++ program into Java, perhaps the: greatest number of changes Will be car seed by pointers. Most <#+ code is heavily dependent upon pointers for its operation. You can’t program anything very Significant in C++ without using a pointer. There are four general categories of pointer usage that you will encounter in C++ code.…

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Migrating from C+tto Java

Migrating from C+to Java T’his chapter discusses several of the issues that arise when you move from C++ ,to  Java. Since happy (if not most) Java programmers come from a C++ background, it is natural to want to carryover the skills, techniques, and code acquired in this language. Although C++ and Java were designed to address the programming needs of two…

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