java反射机制

  Class startupClass =
            catalinaLoader.loadClass
            ("org.apache.catalina.startup.Catalina");
        Object startupInstance = startupClass.newInstance();

 String methodName = "setParentClassLoader";
        Class paramTypes[] = new Class[1];
        paramTypes[0] = Class.forName("java.lang.ClassLoader");
        Object paramValues[] = new Object[1];
        paramValues[0] = sharedLoader;
        Method method =
            startupInstance.getClass().getMethod(methodName, paramTypes);
        method.invoke(startupInstance, paramValues);

调用getClass	Boolean var1 = true; Class<?> classType2 = var1.getClass(); System.out.println(classType2); 输出：class java.lang.Boolean
运用.class 语法	Class<?> classType4 = Boolean.class; System.out.println(classType4); 输出：class java.lang.Boolean
运用static method Class.forName()	Class<?> classType5 = Class.forName("java.lang.Boolean"); System.out.println(classType5); 输出：class java.lang.Boolean

 

 

 

调用getClass Boolean var1 = true;

Class<?> classType2 = var1.getClass();

System.out.println(classType2);

输出：class java.lang.Boolean
 
运用.class 语法 Class<?> classType4 = Boolean.class;

System.out.println(classType4);

输出：class java.lang.Boolean
 
运用static method Class.forName() Class<?> classType5 = Class.forName("java.lang.Boolean");

System.out.println(classType5);