Java Programming thought note (operator)

1. Simpler Print Statements:Print ();
2. Use the Java operator:1. The exception of the operator "=", "= =", "! = ", these operators can manipulate all objects. 2.String Support + =, +
3. Priority Level
4. Assign values:Direct manipulation of fields within objects can lead to confusion
4 (1). Aliasing issues in method calls
5. Arithmetic operators:Random rand = new Random (47);//stochastic generators always produce the same sequence of random numbers for a particular seed value
5 (1). Unary Plus and minus operators
6. Auto increment and decrement:++a (add first, then generate value); a--(Mister Value, then minus)
7. Relational operators:<, >, <=, >=, = =, = = Result is Boolean
7 (1). Equivalence of Test Objects
8. Logical operators:The and, or, or non actions can only be applied to a Boolean value. Short circuit
9. Direct constants:
9 (1). Exponential counting method:1.39e (-43) represents 1.39*10 (-43)//(-43) Index
10. Bitwise operators
11. Displacement Operator:<< (left shift operator), >> (right shift operator)
12. Ternary operator:If-else boolean-exp? Value0:value1//true calculation value0,false calculation value1
13. String operators:+ and + =
14. Errors often made using the operator:Bitwise AND, or (&, |) ; Logic and/or (&&, | | ）
15. Type Conversion operators:Java allows us to convert any basic data type to another base data type, except for the Boolean type.

15 (1). Truncation and rounding:29.7 (29), Math.Round (29.7)//30

15 (2). Lifting

16.Java no sizeof

Java Programming thought note (operator)