While studying records, the programmer is a really good study habits, I also came to one thousand Feng Java training institutions only after habit, here are recent Java training course summarizes some technical knowledge of learning point.
The first lecture, mainly configured Java environment variables. Build a good environment to work. To understand what is compiled and what is running. Javac.exe is responsible for compiling the program; run by java.exe responsible. The resulting compiled bytecode file xxx.class; was obtained after running xxx.class xxx.java. Bytecode file name of the public with the name of the same class of modifications, are unique; xxx.java but each class file in which the correspondence of one to one, is not unique.
A second speaking, the basic data types in Java four eight kinds boolean, byte, char, short, int, long, float, double, and various operators. The follow-up study to the reference data type headache. For example the first contact is a typical array of reference data type. In my opinion, the basic data types with reference data types a big difference: the former is defined for each variable can store only one value, while the latter definition of each variable can store multiple values. The secret of it here.
Lecture, flow control statements, basis functions. Java programs are the next line from the top line of the code, sometimes you need to perform different code, there is a case separately depending on the conditions, when you need to repeat the same code, which requires the control statements. Common flow control statements include branch statement, loop statement. Branch statement is divided into if and switch statements, loops divided while \ do..while \ for. Whether branched or cyclic, can sequentially execute multiple statements, or nested execution, or perform multiple nested. Typical of the multiplication table and can be achieved by diamond loop. And the function is divided: modifier, the return value, the function name (parameter block) {} block method. Note here that the defined functions can not be nested, i.e., another function can not be defined in a function, but the function calls can be nested, i.e., a function can call another function.
Fourth Lecture, function calls, parameters, return values, local and global variables. Function call can not call each other, so causing the death cycle; likewise, can not easily function call itself. Because there are special circumstances, and that is recursive! Its essence is a recursive function calls itself. But we must give it to set conditions to break the cycle of death!
Fifth Lecture array. The basic algorithm is that bubble sort, selection sort, general search, binary search. Arrays are reference data types to learn Java in the first encounter. Any previous array with a basic data type is different, a variable which can be defined by a number of stored values. And all operations of the variable is no longer a direct manipulation of the stored value. But operated by an index identifying each element. This value is passed to the said site and passed.
These are recently learned, to continue living and learning forever, and halted, to dream of high-paying, hundred percent effort, it must be worth it! An ordinary person, not to do your rich, but only in the huge city something to rely on, use this day to learn to ask in exchange for the desired future, it must be my important decision! class of you is willing to join hands with his comrades to create beautiful brilliant future, come on!
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