1.3.1 Advantages of Java language

1.3.2 Key features of Java language

2.2.1 Class

2.2.2 Braces, paragraphs and bodies

2.2.3 The starting point of program execution——main() method

2.2.4 Comments on Java programs

2.2.5 Standards for Javaф

2.2.6 Java keywords

2.2.7 Variables

2.2.8 Variable setting

2.2.9 printin()

2.3.1 Syntax errors

2.3.2 Semantic errors

3.1.1 Variables and Constants

3.1.2 Java variable types

3.1.3 Basic data types

3.1.4 Data type conversion

3.2.1 Expressions and operators

3.2.2 Operator precedence

3.2.3 Expressions

3.2.4 Type conversion of expressions

3.3.1 Structural design of program

3.3.2 Select structure

3.3.3 Multiple selection statement—switch statement

3.3.4 while loop

3.3.5 do…while loop

3.3.6 for loop

3.3.7 Loop nesting

3.3.8 Breaking out of loops

3.3.9 Local variables

4.1.1 Declaration and memory allocation of one-dimensional array

4.1.2 Representation of elements in arrays

4.1.3 Assignment of initial value of array

4.1.4 Simple example: find the maximum and minimum values ​​in the array elements

4.1.5 AP/methods related to array operations

4.2.1 Declaration and memory allocation of two-dimensional arrays

4.2.2 Reference and access to two-dimensional array elements

4.4.1 Simple example of method operation

4.4.2 Method parameters and return values

4.4.3 Overloading of methods

4.4.4 Passing arrays into methods

5.1.1 Object

5.1.2 Encapsulation

5.1.3 Class

5.1.4 Inheritance

5.1.5 Class polymorphism

5.2.1 Class declaration

5.2.2 Creating new objects

5.2.3 Create multiple new objects

5.7.1 Overloading of constructors

5.9.1 Use this to call the constructor

5.10.1 Static variables

5.10.2 Static methods

5.10.3 Understanding the main() method

5.10.4 Static code blocks

5.13.1 Reference to inner classes outside the class

5.13.2 Define inner classes in methods

5.14.1 javadoc tag

5.14.2 General form of documentation comments

5.14.3 javadoc output

6.1.1 Instantiation process of subpairs

6.1.2 Use of super keyword

6.1.3 Restricting access to subclasses

6.1.4 Replication

6.6.1 Use of instanceof keyword

6.6.2 Compound the equals method in the object class

6.6.3 Instantiation of interface objects

7.1.1 Why is exception handling needed?

7.1.2 Simple exception example

7.1.3 Exception handling

7.1.4 Review of exception handling mechanism

7.3.1 Throwing exceptions in the program

7.3.2 Specify method to throw exception

8.1.1 Basic concept of package

8.1.2 Use of import statement

8.1.3 Common packages in JDK

9.2.1 Implement multi-threading by inheriting the Thread class

9.2.2 Implementing multi-threading by implementing the Runnable interface

9.2.3 Comparison of two multi-threading implementation mechanisms

9.4.1 Get and set the name of the thread

9.4.2 Determine whether the thread is started

9.4.3 Background thread and setDaemon() method

9.4.4 Forced running of threads

9.4.5 Thread sleeping

9.4.6 Thread interruption

9.5.1 An artificial intelligence

9.5.2 Synchronized code blocks

9.5.3 Synchronization methods

9.5.3 Deadlock

9.6.1 Introduction to the problem

9.6.2 How to solve the problem

10.3.1 Byte stream

10.3.2 Character stream

10.3.3 Pipe flow

10.3.4 ByteArrayInputStream and ByteArrayOutputStream

10.3.5 System.in and System.out

10.3.6 Print stream

10.3.7 DatalnputStream and DataOutputStream

10.3.8 Merging streams

10.3.10 Class hierarchy diagram in IO package

10.3.9 Conversion of byte stream and character stream

11.2.1 Basic structure of HTML code

11.2.2 Applet mark

11.2.3 Passing parameters used by Applet programs in HTML

12.4.1 System class

12.4.2 Runtime class

12.7.1 Class Set Interface

12.7.2 Collection interface

12.7.3 Accessing a set by substitution method

12.7.4 Handling mappings