Java 中的类 desiredAssertionStatus()方法，带示例

原文:https://www . geeksforgeeks . org/class-desiredassertingstatus-method-in-Java-with-examples/

java.lang.Class 类 的desiredassertingstatus()方法用于获取该类的断言状态，当调用该方法时，该断言状态将被分配给该类。方法以布尔值的形式返回该类的断言状态。

语法:

public boolean desiredAssertionStatus()

参数:该方法不接受任何参数

返回值:该方法以布尔值的形式返回该类的指定断言状态。

下面的程序演示了 desiredAssertionStatus()方法。

例 1:

// Java program to demonstrate
// desiredAssertionStatus() method

import java.util.*;

public class Test {

    public Object obj;

    public static void main(String[] args)
        throws ClassNotFoundException
    {

        // returns the Class object for this class
        Class myClass = Class.forName("Test");

        System.out.println("Class represented by myClass: "
                           + myClass.toString());

        // Get the Assertion Status of myClass
        // using desiredAssertionStatus() method
        System.out.println("Assertion Status of myClass: "
                           + myClass.desiredAssertionStatus());
    }
}

输出:

Class represented by myClass: class Test
Assertion Status of myClass: false

例 2:

// Java program to demonstrate
// desiredAssertionStatus() method

import java.util.*;

class Main {

    private Object obj;

    public static void main(String[] args)
        throws ClassNotFoundException, NoSuchFieldException
    {

        try {

            // returns the Class object for this class
            Class myClass = Class.forName("Main");

            System.out.println("Class represented by myClass: "
                               + myClass.toString());

            // Get the Assertion Status of myClass
            // using desiredAssertionStatus() method
            System.out.println("Assertion Status of myClass: "
                               + myClass.desiredAssertionStatus());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

Class represented by myClass: class Main
Assertion Status of myClass: false

参考:https://docs . Oracle . com/javase/9/docs/API/Java/lang/class . html # desiredassertingstatus–

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