java运算符（java运算符）.doc

java运算符（java运算符） Java operator Expressions in Java are made up of operators and operands. The so-called operators are symbols used to do operations. Operators in Java can basically be divided into arithmetic operators, relational operators, logical operators, bitwise operators, assignment operators, transformation operators, and so on. Arithmetic operators The so-called arithmetic operator, that is, we learned in mathematics add, subtract, multiply, divide and other operations. These operations can be mixed several different types of digital operations, in order to ensure the accuracy of the operation, the system will do the corresponding conversion in the process of operation. 1, digital accuracy The so-called digital precision, which is the system in digital arithmetic operations between, in order to maintain the accuracy of the computer as much as possible, and automatic shift accordingly, the different types of data into the highest precision data type. The rules are as follows: 1) when using the operator to combine two operands together, the two operands are converted into the same type before the operation. 2) one of the two operands is of type double, and the other will be converted to type double. 3) one of the two operands is of type float, and the other will be converted to float. 4) one of the two operands is of type long, and the other will be converted to long. 5) any other type of operation, and the two operands are converted to the int type. 2, integer arithmetic (type int) For int related operations, the results of addition, subtraction, and multiplication are very easy to understand, with emphasis on the addition of (/) operations. The result of the division of two integers is an integer, this point is different and in mathematics, in Java, the two integer division results similar to the operation mode for mathematics. The remainder of divisibility is expressed by%, for example, 15 / 2 = 7, not 7.5, 15%, 2 = 1. Lets check with the program: * two int