Java-operator and judgment

Operator:
1) arithmetic operator: +-*/%,++,--

Add, subtract, multiply, divide, take remainder, self-increment, self-subtract
2) relational operator: >,<,>=,<=,==,!= Boolean type

Determine the value of two shaping or floating-point sizes to be Boolean

3) logical operator: &&,| |,! Boolean type

&&: Short-circuit and (and), both sides are true, see false False if the 1th number is false, a short circuit occurs (the latter is not executed)
| |: Short circuit or (or), one side is true, see true True if the 1th number is true, a short-circuit occurs (the back is not executed)
!: logical non (take reverse), non-true false, not false then true

4) Assignment operator: =,+=,-=,*=,/=,%=

Assigning a value of the corresponding type to a variable
5) String Join operator: +
6) Three mesh operator: Boolean number 1: Number 2

Boolean number 1: Number 2
　　
To calculate the Boolean value:
If true, the result of the entire expression is 1 if false, the result of the entire expression is 2

Branching structure: Conditional execution of a statement, not every sentence must go
1) If:1 Road
2) If...else:2 Road
3) If...else if: Multiple paths
4) Switch...case: multiple routes
Advantages: High efficiency, clear structure
Cons: Integers, equals
Break: Jump out of switch

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Java-operator and judgment