java基础第24课

java基础第24课

work107.javapackage test06;import java.lang.reflect.Method;import org.omg.CosNaming.IstringHelper;//反射public class work107{ public static void main(String[] args) { Example_03 example1 = new Example_03(); Class excClass = example1.getClass(); Method[] declareMethods = excClass.getDeclaredMethods(); for (int i = 0; i < declareMethods.length; i++) { Method method1 = declareMethods[i]; System.out.println("名称为：" + method1.getName()); System.out.println("是否允许带有可变数量的参数 " + method1.isVarArgs()); System.out.println("入口参数类型依次为："); Class[] parameterTypes = method1.getParameterTypes(); for (int j = 0; j < parameterTypes.length; j++) { System.out.println(" " + parameterTypes[j]); } System.out.println("返回值类型为：" + method1.getReturnType()); System.out.println("可能抛出的异常类型有："); Class[] exceptionTypes = method1.getExceptionTypes(); for (int k = 0; k < exceptionTypes.length; k++) { System.out.println(" " + exceptionTypes[k]); } boolean isTurn = true; while (isTurn) { try { isTurn = false; if (method1.getName().equals("staticMethod")) { method1.invoke(example1); } else if ("publicMethod".equals(method1.getName())) { System.out.println("返回值为：" + method1.invoke(example1, 168)); } else if (method1.getName().equals("protectedMethod")) { System.out.println("返回值为：" + method1.invoke(example1, "7",5)); } else if ("privateMethod".equals(method1.getName())) { Object[] parameters = new Object[]{new String[]{"M","V","P"}}; System.out.println("返回值为：" + method1.invoke(example1, parameters)); } } catch (Exception e) { System.out.println("在执行方式时抛出了异常，下面执行setAccessible（）方法"); method1.setAccessible(true); isTurn = true; } } System.out.println(); } }//function end}class Example_03{ static void staticMethod() { System.out.println("执行staticMethod（）方法"); } public int publicMethod(int i) { System.out.println("执行publicMethod（）方法"); return i * 100; } protected int protectedMethod(String str1,int i) throws NumberFormatException { System.out.println("执行protectedMetod（）方法"); return Integer.valueOf(str1) + i; } private String privateMethod(String...strs) { System.out.println("执行privateMethod（）方法"); StringBuffer buffer1 = new StringBuffer(); for (int i = 0; i < strs.length; i++) { buffer1.append(strs[i]); } return buffer1.toString(); }}work108.javapackage test06;public @interface work108{ //大家可以把work108，替换为NoMemberAnnotation， //不包含成员的}

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