public final native Class<?> getClass()

Class<Date> cls = Date.class

Class<Comparable> cls = Comparable.class;

Class<Integer> intCls = int.class;
Class<Byte> byteCls = byte.class;
Class<Character> charCls = char.class;
Class<Double> doubleCls = double.class;

Class<Void> voidCls = void.class;

String[] strArr = new String[10];
int[][] twoDimArr = new int[3][2];
int[] oneDimArr = new int[10];
Class<? extends String[]> strArrCls = strArr.getClass();
Class<? extends int[][]> twoDimArrCls = twoDimArr.getClass();
Class<? extends int[]> oneDimArrCls = oneDimArr.getClass();

Class<?> cls = Class.forName("java.util.HashMap");

public String getName()
public String getSimpleName()
public String getCanonicalName()
public Package getPackage()

//返回所有的public字段，包括其父类的，如果没有字段，返回空数组
public Field[] getFields()
//返回本类声明的所有字段,包括非public的，但不包括父类的
public Field[] getDeclaredFields()
//返回本类或者父类中指定名字的public字段，找不到抛异常
public Field getField(String name)
//根据名字找本类的字段
public Field getDeclaredField(String name)

//获取字段名称
public String getName()
//判断当前程序是否有该字段的访问权限
public boolean isAccessible()
//flag设为true表示允许读写非public的字段
public void setAccessible(boolean flag)
//获取指定对象obj中该字段的值
public Object get(Object obj)
//将指定对象obj中该字段的值设为value
public void set(Object obj, Object value)

public int getModifiers()
public Class<?> getType()
public void setBoolean(Object obj, boolean z)
public boolean getBoolean(Object obj)
public void setDouble(Object obj, double d)
public double getDouble(Object obj)
public <T extends Annotation> T getAnnotation(Class<T> annotationClass)
public Annotation[] getDeclaredAnnotations()

        try {Field f = Test.class.getDeclaredField("MAX_COUNT");int mod = f.getModifiers();System.out.println(Modifier.toString(mod)); //private static finalSystem.out.println(Modifier.isPublic(mod));//false} catch (NoSuchFieldException e) {e.printStackTrace();}

public Method[] getMethods()
public Method[] getDeclaredMethods()
public Method getMethod(String name, Class<?>... parameterTypes)
public Method getDeclaredMethod(String name, Class<?>... parameterTypes)

public String getName()
public void setAccessible(boolean flag)
public Object invoke(Object obj, Object... args) throws
IllegalAccessException, Illegal-ArgumentException, InvocationTargetException

public T newInstance() throws InstantiationException, IllegalAccessException

public Constructor<?>[] getConstructors()
public Constructor<?>[] getDeclaredConstructors()
public Constructor<T> getConstructor(Class<?>... parameterTypes)
public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)

public T newInstance(Object ... initargs) throws InstantiationException,
IllegalAccessException, IllegalArgumentException, InvocationTargetException

Constructor<StringBuilder> contructor= StringBuilder.class
.getConstructor(new Class[]{int.class});
StringBuilder sb = contructor.newInstance(100);

public native boolean isInstance(Object obj);

Class cls = Class.forName("java.util.ArrayList");if(cls.isInstance(list)){System.out.println("array list");
}

public T cast(Object obj)

//检查参数类型cls能否赋值给当前class类型的变量
public native boolean isAssignableFrom(Class<?> cls);

public native boolean isArray()
public native boolean isPrimitive() //是否是基础类型
public native boolean isInterface()
public boolean isEnum()
public boolean isAnnotation()
public boolean isAnonymousClass() //是否是匿名类
public boolean isMemberClass()  //是否是成员类，成员类定义在方法外，不是匿名类
public boolean isLocalClass() //是否是本地类，本地类定义在方法内，不是匿名类

public native int getModifiers()
public native Class<? super T> getSuperclass()
//对于类，为自己声明实现的所有接口，对于接口为直接扩展的接口，不包括父类继承的
public native Class<?>[] getInterfaces();
//自己声明的注解
public Annotation[] getDeclaredAnnotations()
//所有注解包括继承得到的
public Annotation[] getAnnotations()
//获取或者检查指定类型的注解
public <A extends Annotation> A getAnnotation(Class<A> annotationClass)
public boolean isAnnotationPresent(
Class<? extends Annotation> annotationClass)

public static Class<?> forName(String className) //这里的className与Class.getName()返回的值一致
public static Class<?> forName(String name, boolean initialize, ClassLoader loader) //inntialize表示加载后，是否执行类的初始化代码（如static语句块）

Class.forName(className, true, currentLoader)

public native Class<?> getComponentType()

String[] arr = new String[]{};
System.out.println(arr.getClass().getComponentType());//class java.lang.String

//创建指定元素类型、长度的数组
public static Object newInstance(Class<?> componentType, int length)
//创建多维数组
public static Object newInstance(Class<?> componentType, int... dimensions)
//获取数组array指定索引位置index处的值
public static native Object get(Object array, int index)
//修改数组array指定的索引位置的index处的值为value
public static native void set(Object array, int index, Object value)
//返回数组的长度
public static native int getLength(Object array)

public static native double getDouble(Object array, int index)
public static native void setDouble(Object array, int index, double d)
public static native void setLong(Object array, int index, long l)
public static native long getLong(Object array, int index)

public T[] getEnumConstants()

public TypeVariable<Class<T>>[] getTypeParameters()

public Type getGenericType()

public Type getGenericReturnType()
public Type[] getGenericParameterTypes()
public Type[] getGenericExceptionTypes()

public Type[] getGenericParameterTypes()