package tutorial;
//检索方法
//可以找到隶属于一个类的所有方法,通过getMethods包含Method数组,进而得到该方法的返回类型,修饰符,方法名称,参数列表
//步骤:
//a.指定类的Class Object
//b.getMethods()获取Method[]对象
//c,遍历该数组对象
import java.lang.reflect.*;
import java.awt.*;
class SampleMethod {
public static void main(String[] args) {
Polygon p = new Polygon();
showMethods(p);
}
static void showMethods(Object o) {
Class c = o.getClass();
System.out.println(c.getName());
Method[] theMethods = c.getMethods();
for (int i = 0; i < theMethods.length; i++) {
String methodString = theMethods[i].getName();
System.out.println("Name: " + methodString);
String returnString =
theMethods[i].getReturnType().getName();
System.out.println(" Return Type: " + returnString);
Class[] parameterTypes = theMethods[i].getParameterTypes();
System.out.print(" Parameter Types:");
for (int k = 0; k < parameterTypes.length; k ++) {
String parameterString = parameterTypes[k].getName();
System.out.print(" " + parameterString);
}
System.out.println();
}
}
}
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