利用反射——动态调用类中的方法

public class MethodTest {

public static void main(String[] args) {
try {
System.err.println("调用Math类的静态方法sin():");
Method sinMethod = Math.class.getDeclaredMethod("sin", Double.TYPE);
Double sin = (Double)sinMethod.invoke(null, new Integer(1));
System.out.println("1的正弦值是："+sin);
System.err.println("调用String类的非静态方法equals():");
Method equalsMethod = String.class.getDeclaredMethod("equals",Object.class);
Boolean equals = (Boolean)equalsMethod.invoke(new String("柯基"),"柯基");
System.out.println("字符串是否是柯基："+equals);
} catch (Exception e) {
e.printStackTrace();
}
}
}