Java thread priority instance analysis

1. Description

• When the current thread does not specify a priority, all threads have normal priority.

• Priority is specified from 1 to 10. 10 shows the highest priority, 1 shows the lowest priority, and 5 shows the normal priority. The thread with the highest priority executes first. However, there is no guarantee that the thread will enter the running state when it is started.

• A running thread may always have a higher priority than a thread waiting for a chance to run in the thread pool.

• The scheduler decides which thread to execute.

• t.setPriority() is used to set the priority of the thread.

• Before the thread start method is called, remember the priority of the thread.

• MIN_PRIORITY, MAX_PRIORITY, NORM_PRIORITY, etc., set the priority. The priority of the Java thread is an integer.

2. Example

    public static final int MIN_PRIORITY = 1;
    public static final int NORM_PRIORITY = 5;
    public static final int MAX_PRIORITY = 10;

What collection classes are there in Java

Collections in Java are mainly divided into four categories:

1. List: ordered and repeatable;

2. Queue: ordered and repeatable;

3. Set: non-repeatable;

4. Map mapping: unordered, unique keys, but not unique values.

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