我需要调用cowsay.exe(此程序将符号用于绘制动物)并执行命令:Cowsay“ hello”.如何传递“ hello”作为参数?public class cowsay {public static void main(String[] args) throws IOException {Process process = new ProcessBuilder("D:\\cowsay.exe","cowsay Hello").start();InputStream is = process.getInputStream();InputStreamReader isr = new InputStreamReader(is);BufferedReader br = new BufferedReader(isr);Str...
我对loadView方法仅被调用一次(创建mainView bean时)是否正确?@Configuration public class Config {@Bean(name = "mainView")public View getMainView() throws IOException {return loadView("fxml/main.fxml");}@Beanpublic MainController getMainController() throws IOException {return (MainController) getMainView().getController();}@Beanpublic Step1Controller getStep1Controller() throws IOException {return ge...
这个问题已经在这里有了答案: > How to get minimum and maximum value from List of Objects using Java 8 1个我从Java 8中的Stream API开始. 这是我使用的Person对象:public class Person {private String firstName;private String lastName;private int age;public Person(String firstName, String lastName, int age) {this.firstName = firstName;this.lastNam...
我的任务是创建一个模拟预付费手机使用情况的程序.它只能具有四个属性,即double creditsLeft,int totalMinutesCalled,double ratePerCall和int textMessagesSent. 该类应实现以下方法:void load(double pesos),void call(int minutes),double getLoadLeft(),int getTotalMinutesCalled(),void printSummary(). 调用printSummary方法时,应在此之后打印出有关MobilePhone实例属性的报告.package javaPackage; public class Driver{p...
我对Java 8功能非常陌生,并尝试了解默认方法.有没有比使用匿名类更简单的方法来通过同一接口的另一个默认方法来调用默认方法?例如:public class Frame{public static void main(String... args){Frame.C c= new Frame.C();c.doSomething();}public interface A{public default void doSomething(){System.out.println("A");}}public interface B extends A {@Overridepublic default void doSomething(){System.out.println("B")...
我在应用程序的服务器日志中收到一个奇怪的异常.当对某个URL进行GET请求时,会发生此异常.该网址具有以下格式-/some_list/{id}/some_method为此定义的处理程序-@RestController @Validated public class SomeController {@Autowiredprivate SomeService someService;@RequestMapping(value = "/some_list/{id}/some_method", method = RequestMethod.GET)public Collection<SomeObject> getCollection(@PathVariable @SomeCustomJav...
我正在尝试模拟KeyStore类.模拟后,如果加载方法被调用,我不希望发生任何事情.因此,我写了以下几行来实现这一目标.@PrepareForTest(KeyStoreFactory.class)@Testpublic void should_verify_signature_when_verifySignature_called_with_fileName_and_certificate_details_in_verifySignature_method() throws Exception {PowerMockito.mockStatic(KeyStoreFactory.class);KeyStore keyStoreMock = PowerMockito.mock(KeyStore.class...
如果我有一个嵌套类的父类.然后在Java中,嵌套类可以在其父类中调用方法.但是在C#中您无法做到这一点,并且抱怨说“无法调用非静态的外部类方法”. 行为不同的任何原因是什么? PS:我是一名Java程序员,正在学习C#,请原谅我有限的知识 例:public class parent{void methodA(){ }public class nested{void methodB(){methodA(); /// <-- not allowed in C# but good in java} } }解决方法:这是因为在Java中,我们有inner classes...
为了查看java中的finalize()方法的工作情况(当对象即将被销毁时会被调用),我编写了以下程序class counterTest{public static int count;public counterTest(){count++;} }public class finalize {public static void main(String args[]){counterTest obj1=new counterTest();System.out.println("Number of objects :" + counterTest.count);counterTest obj2=new counterTest();System.out.println("Number of objects :" + coun...
我需要通过这样的线程来计算数组:public class Calculator implements Callable<int[]> {@Overridepublic int[] call() {int[] result = new int[100];for (int i = 0; i < result.length; i++) {result[i]++;}return result;} }主线程可能看起来像这样:ExecutorService executor = Executors.newFixedThreadPool(1); Future<int[]> future = executor.submit(new Calculator()); int[] result = future.get();我无法弄清楚如何确...
我试图运行第一个example. 源代码是:/*keyWordCount.java */import org.apache.spark.*;import org.apache.spark.api.java.*;import org.apache.spark.api.java.function.*;import org.apache.spark.rdd.*;import org.apache.spark.api.java.JavaRDD;import java.util.*;public class keyWordCount {public static void main(String[] args) {SparkConf conf = new SparkConf().setAppName("keyWordCount");JavaSparkContext sc =...
我正在建立一个与谷歌地图有关的应用程序.在这种情况下,我试图在片段中实现地图.我在OnMapReady方法中操作地图.但是应用程序未调用OnMapReady方法.我在活动中实现了同一件事,并且完美地完成了工作.但是它不是零碎的.我不知道它是否存在片段生命周期的问题,并且我缺少某些东西.这是代码. Maps_Fragment.javapackage com.example.mudasir.login;import android.content.pm.PackageManager; import android.location.Address; import ...
我正在使用Spring安全Oauth2构建一个rest API来保护它. 以下curl命令成功运行,我得到了令牌:curl -X POST -vu clientapp:123456 http://localhost:8080/dms-application-0.0.1-SNAPSHOT/oauth/token -H "Accept: application/json" -d "password=spring&username=roy&grant_type=password&scope=read%20write&client_secret=123456&client_id=clientapp"以下获取令牌的测试也成功运行:@Test public void getAccessToken() throws...
使用spring-web-4.2.6,我具有以下Controller和ExceptionHandler:@ControllerAdvice public class ExceptionsHandler {@ExceptionHandler(Exception.class)public ResponseEntity<ErrorDTO> HandleDefaultException(Exception ex) {...}@ExceptionHandler(InternalError.class)public ResponseEntity<ErrorDTO> HandleInternalError(InternalError ex) {...} }@RestController @RequestMapping("/myController") public class MyCo...
介绍 我正在尝试进行一个测试,以验证(使用Mockito v1.9.5的验证)在执行传递Foo.deinit()之后调用接口Bar中具有签名deinit()的方法,并且我我碰到一个我真的不明白的错误. 这是我尝试运行的FooTest.java:@RunWith(JukitoRunner.class) public class FooTest {@Injectprivate Foo foo;@Injectprivate Bar bar;public static class TestModule extends JukitoModule {@Overrideprotected void configureTest() {bind(Foo.class).to(Fo...