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chapter12 Java模块化/java9-action-static/dockerx-traffic-optional-gui/src/main/java/com/dockerx/traffic/optional/gui
- Gui.java

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Lines changed: 1 addition & 4 deletions

Original file line number	Diff line number	Diff line change
`@@ -10,21 +10,18 @@`
`10`	`10`	`public class Gui {`
`11`	`11`	`public static void main(String[] args) {`
`12`	`12`	`//module-info.java 文件中使用static修饰后,会在编译阶段直接忽略这个类,不会加载到文件系统中,`
`13`		`- // 不过想要使用可以通过反射获取,我们有requires的`
`14`	`13`	`// 下面注释掉的两条语句都会报ClassNotFoundException`
`15`	`14`	`/*Person person = new Person(100, 1);`
`16`	`15`	`System.out.println(Person.class.getAnnotations().length);*/`
`17`	`16`
`18`	`17`	`System.out.println(Bike.class.getAnnotations().length);`
`19`	`18`	`System.out.println("Running without annotation @Anno present.");`
`20`		`-`
	`19`	`+//同样,使用反射也是不行的,会报下面catch到的错了`
`21`	`20`	`try {`
`22`	`21`	`Class<?> clazz = Class.forName("com.dockerx.traffic.optional.entity.Person");`
`23`	`22`	`Person instance =`
`24`	`23`	`(Person) clazz.getConstructor().newInstance();`
`25`	`24`	`instance.setMileage(10);`
`26`		`- //同样,添加下面注释这句,就会报下面catch到的错了`
`27`		`- // System.out.println(Person.class.getAnnotations().length);`
`28`	`25`	`System.out.println("Using Person");`
`29`	`26`	`} catch (ReflectiveOperationException e) {`
`30`	`27`	`System.out.println("Oops, we need a fallback!");`

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