// 定義一個接口，命名約定為 YourInterfaceNameMBean
public interface HelloMBean {
    String getName();
    void setName(String name);
    void sayHello();
}
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// 實現(xiàn)上述接口的類
public class Hello implements HelloMBean {
    private String name;
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    @Override
    public String getName() {
        return name;
    }
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    @Override
    public void setName(String name) {
        this.name = name;
    }
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    @Override
    public void sayHello() {
        System.out.println("Hello, " + name + "!");
    }
}
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// 主程序
public class Main {
    public static void main(String[] args) throws Exception {
        // 創(chuàng)建標準 MBean 實例
        HelloMBean helloMBean = new Hello();
        
        // 創(chuàng)建 MBeanServer
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
        
        // 創(chuàng)建 ObjectName，用于標識 MBean
        ObjectName name = new ObjectName("com.example:type=Hello");
        
        // 注冊 MBean 到 MBeanServer
        mbs.registerMBean(helloMBean, name);
        
        // 等待一段時間，使得可以通過 JConsole 或者其他 JMX 客戶端來操作 MBean
        Thread.sleep(Long.MAX_VALUE);
    }
}

import javax.management.*;
import java.lang.management.ManagementFactory;
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public class DynamicHello implements DynamicMBean {
    private String name;
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    @Override
    public Object getAttribute(String attribute) throws AttributeNotFoundException, MBeanException, ReflectionException {
        if (attribute.equals("Name")) {
            return name;
        } else {
            throw new AttributeNotFoundException("Attribute '" + attribute + "' not found");
        }
    }
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    @Override
    public void setAttribute(Attribute attribute) throws AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {
        if (attribute.getName().equals("Name")) {
            name = (String) attribute.getValue();
        } else {
            throw new AttributeNotFoundException("Attribute '" + attribute.getName() + "' not found");
        }
    }
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    @Override
    public AttributeList getAttributes(String[] attributes) {
        AttributeList attrs = new AttributeList();
        for (String attr : attributes) {
            try {
                Object value = getAttribute(attr);
                attrs.add(new Attribute(attr, value));
            } catch (Exception e) {
                // Ignore if attribute not found
            }
        }
        return attrs;
    }
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    @Override
    public AttributeList setAttributes(AttributeList attributes) {
        AttributeList responseAttrs = new AttributeList();
        for (Attribute attr : attributes.asList()) {
            try {
                setAttribute(attr);
                responseAttrs.add(new Attribute(attr.getName(), getAttribute(attr.getName())));
            } catch (Exception e) {
                // Ignore if attribute not found or set failed
            }
        }
        return responseAttrs;
    }
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    @Override
    public Object invoke(String actionName, Object[] params, String[] signature) throws MBeanException, ReflectionException {
        if (actionName.equals("sayHello")) {
            return "Hello, " + name + "!";
        } else {
            throw new UnsupportedOperationException("Operation '" + actionName + "' not supported");
        }
    }
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    @Override
    public MBeanInfo getMBeanInfo() {
        MBeanAttributeInfo[] attributes = new MBeanAttributeInfo[]{
                new MBeanAttributeInfo("Name", "java.lang.String", "Name of the person", true, true, false)
        };
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        MBeanOperationInfo[] operations = new MBeanOperationInfo[]{
                new MBeanOperationInfo("sayHello", "Say hello to the person", null, "java.lang.String", MBeanOperationInfo.ACTION)
        };
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        return new MBeanInfo(this.getClass().getName(), "Dynamic Hello MBean", attributes, null, operations, null);
    }
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    public static void main(String[] args) throws Exception {
        DynamicHello dynamicHello = new DynamicHello();
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
        ObjectName name = new ObjectName("com.example:type=DynamicHello");
        mbs.registerMBean(dynamicHello, name);
        Thread.sleep(Long.MAX_VALUE);
    }
}

import javax.management.*;
import javax.management.modelmbean.*;
import java.lang.management.ManagementFactory;
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public class SimpleModelMBeanExample {
    public static void main(String[] args) throws Exception {
        // 創(chuàng)建 ModelMBeanInfo 對象
        ModelMBeanInfo modelMBeanInfo = createModelMBeanInfo();
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        // 創(chuàng)建 ModelMBean 實例
        ModelMBean modelMBean = createModelMBean(modelMBeanInfo);
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        // 創(chuàng)建 MBeanServer
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
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        // 創(chuàng)建 ObjectName，用于標識 MBean
        ObjectName name = new ObjectName("com.example:type=SimpleModelMBean");
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        // 注冊 ModelMBean 到 MBeanServer
        mbs.registerMBean(modelMBean, name);
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        // 等待一段時間，使得可以通過 JConsole 或者其他 JMX 客戶端來操作 MBean
        Thread.sleep(Long.MAX_VALUE);
    }
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    private static ModelMBeanInfo createModelMBeanInfo() throws Exception {
        // 創(chuàng)建屬性描述符
        Descriptor nameDesc = new DescriptorSupport();
        nameDesc.setField("name", "Name");
        nameDesc.setField("descriptorType", "attribute");
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        // 創(chuàng)建操作描述符
        Descriptor sayHelloDesc = new DescriptorSupport();
        sayHelloDesc.setField("name", "sayHello");
        sayHelloDesc.setField("descriptorType", "operation");
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        // 創(chuàng)建屬性列表
        MBeanAttributeInfo[] attributes = new MBeanAttributeInfo[]{
                new MBeanAttributeInfo("Name", "java.lang.String", "Name of the person", true, true, false, nameDesc)
        };
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        // 創(chuàng)建操作列表
        MBeanOperationInfo[] operations = new MBeanOperationInfo[]{
                new MBeanOperationInfo("sayHello", "Say hello to the person", null, "java.lang.String", MBeanOperationInfo.ACTION, sayHelloDesc)
        };
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        // 創(chuàng)建 ModelMBeanInfo
        ModelMBeanInfo modelMBeanInfo = new ModelMBeanInfoSupport(
                SimpleModelMBeanExample.class.getName(),
                "Simple Model MBean Example",
                attributes,
                null,
                operations,
                null
        );
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        return modelMBeanInfo;
    }
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    private static ModelMBean createModelMBean(ModelMBeanInfo modelMBeanInfo) throws Exception {
        // 創(chuàng)建 ModelMBean 實例
        RequiredModelMBean modelMBean = new RequiredModelMBean();
        modelMBean.setModelMBeanInfo(modelMBeanInfo);
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        // 創(chuàng)建 MBean 實例
        ObjectName name = new ObjectName("com.example:type=SimpleModelMBean");
        SimpleModelMBean example = new SimpleModelMBean();
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        // 設(shè)置 MBean 實例
        modelMBean.setManagedResource(example, "ObjectReference");
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        return modelMBean;
    }
}

import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;
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public class MXBeanExample {
    public static void main(String[] args) {
        // 獲取 MemoryMXBean 實例
        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
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        // 獲取堆內(nèi)存使用情況
        MemoryUsage heapMemoryUsage = memoryMXBean.getHeapMemoryUsage();
        System.out.println("Heap Memory Usage:");
        System.out.println("    Init: " + heapMemoryUsage.getInit() / (1024 * 1024) + " MB");
        System.out.println("    Used: " + heapMemoryUsage.getUsed() / (1024 * 1024) + " MB");
        System.out.println("    Committed: " + heapMemoryUsage.getCommitted() / (1024 * 1024) + " MB");
        System.out.println("    Max: " + heapMemoryUsage.getMax() / (1024 * 1024) + " MB");
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        // 獲取非堆內(nèi)存使用情況
        MemoryUsage nonHeapMemoryUsage = memoryMXBean.getNonHeapMemoryUsage();
        System.out.println("Non-Heap Memory Usage:");
        System.out.println("    Init: " + nonHeapMemoryUsage.getInit() / (1024 * 1024) + " MB");
        System.out.println("    Used: " + nonHeapMemoryUsage.getUsed() / (1024 * 1024) + " MB");
        System.out.println("    Committed: " + nonHeapMemoryUsage.getCommitted() / (1024 * 1024) + " MB");
        System.out.println("    Max: " + nonHeapMemoryUsage.getMax() / (1024 * 1024) + " MB");
    }
}

// 定義 MXBean 接口
public interface MyMXBean {
    // 屬性：名稱
    String getName();
    void setName(String name);
    
    // 操作：打印消息
    void printMessage(String message);
}
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// 實現(xiàn)類
public class MyMXBeanImpl implements MyMXBean {
    private String name;
    
    // 實現(xiàn)屬性的 getter 和 setter 方法
    @Override
    public String getName() {
        return name;
    }
    
    @Override
    public void setName(String name) {
        this.name = name;
    }
    
    // 實現(xiàn)操作的方法
    @Override
    public void printMessage(String message) {
        System.out.println(message);
    }
}
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// 在管理應(yīng)用程序中注冊和使用自定義的 MXBean
public class MyMXBeanRegistration {
    public static void main(String[] args) throws Exception {
        // 創(chuàng)建 MXBean 實例
        MyMXBean mxBean = new MyMXBeanImpl();
        
        // 注冊 MXBean 到 MBeanServer
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
        ObjectName name = new ObjectName("com.example:type=MyMXBean");
        mbs.registerMBean(mxBean, name);
        
        // 等待一段時間，使得可以通過 JConsole 或者其他 JMX 客戶端來操作 MXBean
        Thread.sleep(Long.MAX_VALUE);
    }
}

import javax.management.*;
import javax.management.openmbean.*;
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public class OpenMBeanExample {
    public static void main(String[] args) throws Exception {
        // 創(chuàng)建 OpenType
        OpenType<String> stringType = SimpleType.STRING;
        OpenType<Integer> integerType = SimpleType.INTEGER;
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        // 創(chuàng)建 OpenMBeanAttributeInfo
        OpenMBeanAttributeInfoSupport nameAttrInfo = new OpenMBeanAttributeInfoSupport(
                "Name",
                "Name of the person",
                stringType,
                true,
                false,
                false
        );
        OpenMBeanAttributeInfoSupport ageAttrInfo = new OpenMBeanAttributeInfoSupport(
                "Age",
                "Age of the person",
                integerType,
                true,
                false,
                false
        );
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        // 創(chuàng)建 OpenMBeanOperationInfo
        OpenMBeanParameterInfo[] params = new OpenMBeanParameterInfo[]{};
        OpenMBeanOperationInfoSupport sayHelloOpInfo = new OpenMBeanOperationInfoSupport(
                "sayHello",
                "Say hello to the person",
                params,
                stringType,
                OpenMBeanOperationInfo.ACTION
        );
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        // 創(chuàng)建 OpenMBeanInfo
        OpenMBeanInfoSupport mbeanInfo = new OpenMBeanInfoSupport(
                SimpleOpenMBean.class.getName(),
                "Simple Open MBean Example",
                new OpenMBeanAttributeInfo[]{nameAttrInfo, ageAttrInfo},
                null,
                new OpenMBeanOperationInfo[]{sayHelloOpInfo},
                null
        );
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        // 創(chuàng)建 OpenMBean 實例
        SimpleOpenMBean mbean = new SimpleOpenMBean("John", 30);
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        // 創(chuàng)建 MBeanServer
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
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        // 創(chuàng)建 ObjectName，用于標識 MBean
        ObjectName name = new ObjectName("com.example:type=SimpleOpenMBean");
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        // 注冊 OpenMBean 到 MBeanServer
        mbs.registerMBean(mbean, name);
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        // 等待一段時間，使得可以通過 JConsole 或者其他 JMX 客戶端來操作 MBean
        Thread.sleep(Long.MAX_VALUE);
    }
}
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// 實現(xiàn) OpenMBean
public class SimpleOpenMBean implements OpenMBean {
    private String name;
    private int age;
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    public SimpleOpenMBean(String name, int age) {
        this.name = name;
        this.age = age;
    }
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    @Override
    public Object getAttribute(String attribute) throws AttributeNotFoundException, MBeanException, ReflectionException {
        if (attribute.equals("Name")) {
            return name;
        } else if (attribute.equals("Age")) {
            return age;
        } else {
            throw new AttributeNotFoundException("Attribute " + attribute + " not found");
        }
    }
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    @Override
    public void setAttribute(Attribute attribute) throws AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {
        throw new UnsupportedOperationException("setAttribute not supported");
    }
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    @Override
    public Object invoke(String actionName, Object[] params, String[] signature) throws MBeanException, ReflectionException {
        if (actionName.equals("sayHello")) {
            return "Hello, " + name + "!";
        } else {
            throw new UnsupportedOperationException("Operation " + actionName + " not supported");
        }
    }
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    @Override
    public MBeanInfo getMBeanInfo() {
        // 實現(xiàn) OpenMBean 接口的 getMBeanInfo 方法，返回 MBean 的元數(shù)據(jù)信息
        return null;
    }
}