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法學在 Java 中更改執行緒優先順序
可以透過實現 Runnable 介面並重寫 run() 方法來建立一個執行緒。然後可以建立一個 Thread 物件並呼叫 start() 方法。
執行緒優先順序決定了將處理器提供給執行緒以及其他資源的時間。可以使用 Thread 類的 setPriority() 方法來更改它。
以下給出了一個程式，演示如何在 Java 中使用 setPriority() 方法更改執行緒優先順序
示例
public class ThreadDemo extends Thread {
public void run() {
System.out.println("Running...");
}
public static void main(String[] args) {
ThreadDemo thread1 = new ThreadDemo();
ThreadDemo thread2 = new ThreadDemo();
ThreadDemo thread3 = new ThreadDemo();
ThreadDemo thread4 = new ThreadDemo();
ThreadDemo thread5 = new ThreadDemo();
System.out.println("Default thread priority of Thread 1: " + thread1.getPriority());
System.out.println("Default thread priority of Thread 2: " + thread2.getPriority());
System.out.println("Default thread priority of Thread 3: " + thread3.getPriority());
System.out.println("Default thread priority of Thread 4: " + thread4.getPriority());
System.out.println("Default thread priority of Thread 5: " + thread5.getPriority());
System.out.println("
Changing the default thread priority using the setPriority() method");
thread1.setPriority(7);
thread2.setPriority(3);
thread3.setPriority(9);
thread4.setPriority(2);
thread5.setPriority(8);
System.out.println("
Changed thread priority of Thread 1: " + thread1.getPriority());
System.out.println("Changed thread priority of Thread 2: " + thread2.getPriority());
System.out.println("Changed thread priority of Thread 3: " + thread3.getPriority());
System.out.println("Changed thread priority of Thread 4: " + thread4.getPriority());
System.out.println("Changed thread priority of Thread 5: " + thread5.getPriority());
System.out.println("
" + Thread.currentThread().getName());
System.out.println("
Default thread priority of Main Thread: " + Thread.currentThread().getPriority());
Thread.currentThread().setPriority(10);
System.out.println("Changed thread priority of Main Thread: " + Thread.currentThread().getPriority());
}
}輸出
Default thread priority of Thread 1: 5 Default thread priority of Thread 2: 5 Default thread priority of Thread 3: 5 Default thread priority of Thread 4: 5 Default thread priority of Thread 5: 5 Changing the default thread priority using the setPriority() method Changed thread priority of Thread 1: 7 Changed thread priority of Thread 2: 3 Changed thread priority of Thread 3: 9 Changed thread priority of Thread 4: 2 Changed thread priority of Thread 5: 8 main Default thread priority of Main Thread: 5 Changed thread priority of Main Thread: 10
更新日期：2019 年 7 月 30 日
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