Java Modifier isSynchronized(mod)用法及代码示例

java.lang.reflect.Modifier的isSynchronized(mod)方法用于检查整数参数是否包含同步修饰符。如果此整数参数表示同步类型Modifier，则方法返回true，否则返回false。

用法:

public static boolean isSynchronized(int mod)

参数：此方法接受整数名称，因为mod代表一组修饰符。

返回：如果mod包含synced修饰符，则此方法返回true；否则，此方法返回true。否则为假。

以下示例程序旨在说明isSynchronized()方法：
示例1:

// Java program to illustrate isSynchronized() method 
  
import java.lang.reflect.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
        throws NoSuchFieldException, 
               SecurityException 
    { 
  
        // get Method class object 
        Method[] methods 
            = GFGTest.class.getMethods(); 
  
        // get Modifier Integer value 
        int mod = methods[0].getModifiers(); 
  
        // check Modifier is synchronized or not 
        boolean result 
            = Modifier.isSynchronized(mod); 
  
        System.out.println("Mod integer value "
                           + mod + " is synchronized : "
                           + result); 
    } 
  
    class GFGTest { 
        public synchronized String method1() 
        { 
            return null; 
        } 
    } 
}

输出：

Mod integer value 33 is synchronized : true

示例2:

// Java program to illustrate isSynchronized() 
  
import java.lang.reflect.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
        throws NoSuchFieldException, 
               SecurityException 
    { 
  
        // get Method class object 
        Method[] methods 
            = Thread.class.getMethods(); 
  
        // loop through methods and 
        // print synchronized methods 
        for (int i = 0; i < methods.length; i++) { 
  
            // get Modifier Integer value 
            int mod = methods[i].getModifiers(); 
  
            // check Modifier is synchronized or not 
            boolean result 
                = Modifier.isSynchronized(mod); 
  
            if (result) { 
                System.out.println("synchronized Method: "
                                   + methods[i]); 
            } 
        } 
    } 
}

输出：

synchronized Method: public final synchronized void java.lang.Thread.join(long) throws java.lang.InterruptedException
synchronized Method: public final synchronized void java.lang.Thread.join(long, int) throws java.lang.InterruptedException
synchronized Method: public synchronized void java.lang.Thread.start()
synchronized Method: public final synchronized void java.lang.Thread.stop(java.lang.Throwable)
synchronized Method: public final synchronized void java.lang.Thread.setName(java.lang.String)

参考文献： https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Modifier.html#isSynchronized(int)

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注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 Modifier isSynchronized(mod) method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。