Java Basic Syntax Essentials Summary

1. Variable format: variable name of data type = initialization value;

Class Name Object name =new class name ();

2. Reference data type class interface array

3. Automatic conversion of data type conversions

Cast: int i= (int) 1.5

4. Method: is a piece of code, you can complete a specific function

Can be called repeatedly to improve the reusability of code

Modifier return value type method name (parameter list) {code ... }

5. Loop structure for (initialization expression; Boolean expression; stepping expression) {loop body}

While

6. Array array type [] array name =new data type [length]

Array type [] array name =new data type []{element 1 .... } data type [] array name ={element 1 ... }

7. Create object class name Object name =new class name ();

8. Constructor method Modifier constructor Method name (parameter list) {method body}

9. Inheritance modifier abstract return value type method name (parameter list)

10 Abstract Class class name

11. Interface public interface Name {}

Java Basic Syntax Essentials Summary