79 lines
2.2 KiB
Java
79 lines
2.2 KiB
Java
package test;
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import static java.lang.System.out;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.lang.reflect.Type;
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import java.lang.reflect.TypeVariable;
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import java.util.ArrayList;
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public class RefEx {
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public static void main(String[] args) {
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// TODO Auto-generated method stub
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String s="hello";
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Class c=s.getClass();//获取类型
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System.out.println(c);
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String modifiers=Modifier.toString(c.getModifiers());//获取修饰符
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System.out.println(modifiers);
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TypeVariable<?>[] tv = c.getTypeParameters();//获取泛型类型参数
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if (tv.length != 0) {
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out.format(" ");
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for (TypeVariable<?> t : tv)
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out.format("%s ", t.getName());
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out.format("%n%n");
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} else {
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out.format(" -- No Type Parameters --%n%n");
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}
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Class superclass=c.getSuperclass();//获取类型的父类
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System.out.println(superclass);
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Type[] intfs = c.getGenericInterfaces();//获取类实现的接口
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if (intfs.length != 0) {
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for (Type intf : intfs)
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out.format(" %s%n", intf.toString());
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out.format("%n");
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} else {
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out.format(" -- No Implemented Interfaces --%n%n");
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}
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Annotation[] ann = c.getAnnotations();//获取类的注解
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if (ann.length != 0) {
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for (Annotation a : ann)
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out.format(" %s%n", a.toString());
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out.format("%n");
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} else {
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out.format(" -- No Annotations --%n%n");
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}
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Constructor[] cons=c.getDeclaredConstructors();//获取类的构造方法
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for(Constructor con:cons){
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System.out.println(con.toGenericString());
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}
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out.format("%n%n");
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Field[] fs=c.getDeclaredFields();//获取类的数据成员（成员变量）
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for(Field f:fs){
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System.out.println(f.toGenericString());
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}
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out.format("%n%n");
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Method[] ms=c.getMethods();//获取类的公有成员方法（包含从父类继承的）
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for(Method m:ms){
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System.out.println(m.toGenericString());
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}
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out.format("%n%n");
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}
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}
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