55 lines
1.7 KiB
Java
55 lines
1.7 KiB
Java
package 方法;
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import static java.lang.System.out;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.Type;
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import java.util.Locale;
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public class Deet<T> {
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private boolean testDeet(Locale l) {
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out.format("Locale = %s, Language Code = %s%n", l.getDisplayName(), l.getLanguage());
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return true;
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}
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private boolean testFoo(Locale l) {
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return false;
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}
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private boolean testBar() {
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return true;
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}
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public static void main(String... args) {
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try {
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//获取Deet类的Class实例
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Class<?> c = Deet.class;
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//有Class实例创建一个类对象
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Object t = c.newInstance();
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//获取Class实例对应的类型声明的所有的方法
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Method[] allMethods = c.getDeclaredMethods();
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for (Method m : allMethods) {
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String mname = m.getName();//获取方法的名字
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//如果方法的名字不以test开头，或者返回类型不是boolean型
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if (!mname.startsWith("test") || (m.getReturnType() != boolean.class)) {
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continue;
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}
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//获取方法的所有参数类型
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Type[] pType = m.getGenericParameterTypes();
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//如果有参数，并且第一个参数是Locale类型
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if ((pType.length != 1) || Locale.class.isAssignableFrom(pType[0].getClass())) {
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continue;
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}
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out.format("调用 %s()%n", mname);
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try {
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//调用方法，o是方法返回值
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Object o = m.invoke(t, Locale.CHINA);
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out.format("%s() 返回 %b%n%n", mname, (Boolean) o);
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} catch (InvocationTargetException x) {
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x.printStackTrace();
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} }
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} catch (InstantiationException x) {
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x.printStackTrace();
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} catch (IllegalAccessException x) {
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x.printStackTrace();
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}
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}
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}
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