A review of Java knowledge for beginners

Today is the second day of learning Java. It is not too bad. Let's review what we have learned today.

1. Eight types: Boolean, int, long, short, type, float, double, and char;

2. Pay special attention to the long and float types;

3. Sequence of seven types: type <char, short <int, float <long, double;

4. Arithmetic Operators: +,-, *,/, %, ++, and ,--;

5. Relational operators: <,>, <=, >=, =, and ,! =;

6. logical operators :! , &, |, ^, &, |;

7. Value assignment Symbol: =;

8. Join operators: +;

9. Forced conversion;

10. Three-object OPERATOR: Format: X? Y: Z );