201671010115 Java experience in Java programming in the second week of 2016-2017-2

The second week ended quickly, I learned the new language of Java for two weeks, and the teacher's classroom was basically adapted. This week we learned about the Java Basic program design structure, which is basically similar to the C language I learned, like identifiers, keywords, annotations, and so on. Because of the basis of C, I learned this chapter is not too difficult.

I learned something different from the C language, in terms of identifiers, the definition of identifiers has changed (new dollar sign $), in terms of data types, integer variables have new byte type, no unsigned type; Boolean type Boolean is also added to determine the logical condition , there is no reciprocal conversion between an integer value and a Boolean value. In terms of operators, Java has added two special operators: new (for creating objects), instanceof. In terms of the For loop, the new for Each loop (I'm not sure about its usage yet).

In this chapter, the most I will not be a two-dimensional array, multidimensional arrays and irregular arrays, in the later study, I will ask students to help me learn this aspect of knowledge.

201671010115 Java experience in Java programming in the second week of 2016-2017-2