使用覆盖call()方法和2 ProcessBuilder返回Int

Question

我想用2 projectB从一个projectA执行一个ProcessBuilder。它可以工作，但我必须先注释一下ProcessBuilder才能执行第二个。

这里是我的第一个代码(只有一个名为F04_C.java的文件)

@FXML
private void executerFichierJava02() {
    System.out.println("");
    System.out.println("method: executerFichierJava02()");
    System.out.println("create 1 Service and 1 Task");
    System.out.println("return 1 ProcessBuilder to");
    System.out.println("execute 1 Java class (from project JavaFX_Test02_Desvstory)");

    final Service<Integer> service01 = new Service<Integer>() {
        
        // override createTask() method
        @Override
        protected Task<Integer> createTask() {
            
            return new Task<Integer>() {
                
                // override call() method
                @Override
                protected Integer call() throws Exception {
                    // first ProcessBuilder
                    ProcessBuilder process01 = new ProcessBuilder("/usr/bin/javac", "-d", "./out", "../JavaFX_Test01_Hello_Devstory/src/module-info.java", "../JavaFX_Test01_Hello_Devstory/src/application/Main.java");
                    // second ProcessBuilder
                    ProcessBuilder process01 = new ProcessBuilder("/usr/bin/java", "-p", "./out", "-m", "JavaFX_Test01_Hello_Devstory/application.Main");
                    
                    return process01
                            .inheritIO()
                            .start()
                            .waitFor();
                }
            };  
        }
    };

    // step start Service
    serviceB = service01;
    serviceB.start();       

}

已经说过：

我不得不评论第一或第二ProcessBuilder，我不能运行程序与两种指令。因此，经过研究，我找到了一个链接，以帮助我实现我的目标。How to return 2 values from a Java method?

它告诉我们创建一个类(最好的方法)来返回我想返回的实例。

因此，使用上面的链接，我编写了一个类来返回2 ProcessBuilder

我向您展示了类文件和更新的F04_C.java文件。

package application.model;

public class ClassPB {
    
    //
    private ProcessBuilder pb01 = new ProcessBuilder();
    private ProcessBuilder pb02 = new ProcessBuilder();
    
    // constructeur(s)
    public ClassPB(ProcessBuilder p_pb01, ProcessBuilder p_pb02) {
        this.pb01 = p_pb01;
        this.pb02 = p_pb02;
    }
    
    // getter(s)
    public ProcessBuilder getPB01() {
        return this.pb01;
    }
    
    public ProcessBuilder getPB02() {
        return this.pb02;
    }
}

更新的F04_C.java

@FXML
private void executerFichierJava02() {
    System.out.println("");
    System.out.println("method: executerFichierJava02()");
    System.out.println("create 1 Service and 1 Task");
    System.out.println("return 1 ProcessBuilder to");
    System.out.println("execute 1 Java class (from project JavaFX_Test02_Desvstory)");

    final Service<Integer> service01 = new Service<Integer>() {
        
        // override createTask() method
        @Override
        protected Task<Integer> createTask() {
            
            return new Task<Integer>() {
                
                // override call() method
                @Override
                protected Integer call() throws Exception {
                    
                    ClassPB pbCombines = something();
                    return pbCombines;  
                }
            };
        }
    };

    serviceB = service01;
    serviceB.start();       
        
}

public static ClassPB something() {
    ProcessBuilder pb01 = new ProcessBuilder("/usr/bin/javac", "-d", "./out", "../JavaFX_Test01_Hello_Devstory/src/module-info.java", "../JavaFX_Test01_Hello_Devstory/src/application/Main.java");
    ProcessBuilder pb02 = new ProcessBuilder("/usr/bin/java", "-p", "./out", "-m", "JavaFX_Test01_Hello_Devstory/application.Main");
    
    try {
        pb01
        .inheritIO()
        .start()
        .waitFor();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    
    try {
        pb02
        .inheritIO()
        .start()
        .waitFor();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    
    return new ClassPB(pb01, pb02);
}

但是现在我有一个问题:我必须返回一个Integer，我不知道如何解决这个问题。有什么建议线索吗？

谢谢

Answer 1

好吧，我自己回答。

我找到了一个解决方案，也许不是一个很好的解决方案，但它有效。

类文件ClassPB没有更改，我也没有发布它。

我将F04_C.java文件更改如下：

• 创建名为" state“的作用域类变量
• 创建回调以了解service01
• 的状态" state”类变量跟随service01状态并为service01
• 的每个状态获取值“state”变量的值在服务(任务)

中返回

以下是代码：

@FXML
    private void executerFichierJava02() {
        
        final Service<Integer> service01 = new Service<Integer>() {
            
            // --- step 03, override createTask() method
            @Override
            protected Task<Integer> createTask() {
                
                return new Task<Integer>() {
                    
                    // --- step 04, override call() method
                    @Override
                    protected Integer call() throws Exception {
                        
                        ClassPB pbCombines = retourner2ProcessBuilder("/usr/bin/javac",
                                                        "-d",
                                                        "./out",
                                                        "../JavaFX_Test01_Hello_Devstory/src/module-info.java",
                                                        "../JavaFX_Test01_Hello_Devstory/src/application/Main.java",
                                                        "/usr/bin/java",
                                                        "-p",
                                                        "./out",
                                                        "-m",
                                                        "JavaFX_Test01_Hello_Devstory/application.Main");
                                                
                        // state class variable scope to follow
                        // state of service01
                        // if everything is okay, setted to 1, 2 then 3
                        return state;
                    }
                    
                };
                
            }
            
        };
        
        service01.setOnReady(event -> {
            // not displayed into console
            System.out.println("service 01 ready");
            System.out.println("value of state: " + state);
            System.out.println("value of getException(): " + service01.getException());
            System.out.println("value of getValue(): " + service01.getValue());
            
        });
        service01.setOnScheduled(event -> {
            System.out.println("service 01 scheduled");
            state = 1;
            System.out.println("value of state: " + state);
            System.out.println("value of getException(): " + service01.getException());
            System.out.println("value of getValue(): " + service01.getValue());
        });
        service01.setOnRunning(event -> {
            System.out.println("service 01 running...");
            state = 2;
            System.out.println("value of state: " + state);
            System.out.println("value of getException(): " + service01.getException());
            System.out.println("value of getValue(): " + service01.getValue());
        });
        service01.setOnSucceeded(event -> {
            System.out.println("service 01, state, success");
            System.out.println("service 01, state, finished");
            state = 3;
            System.out.println("value of state: " + state);
            System.out.println("value of getException(): " + service01.getException());
            System.out.println("value of getValue(): " + service01.getValue());
        });
        service01.setOnFailed(event -> {
            System.out.println("service 01, state, failed");
            System.err.println("service failed");
            state = 4;
            System.out.println("value of state: " + state);
            service01.getException().printStackTrace();
            System.out.println("value of getException(): " + service01.getException());
            System.out.println("value of getValue(): " + service01.getValue());
        });
        service01.setOnCancelled(event -> {
            System.out.println("service 01, state, cancelled");
            state = 5;
            System.out.println("value of state: " + state);
            System.out.println("value of getException(): " + service01.getException());
            System.out.println("value of getValue(): " + service01.getValue());
        });
        
        // --------------------------------------------------------
        
        // start Service
        
        serviceB = service01;
        serviceB.start();       
        
    }
    
    // =======================================================
    
    // methode 07C
    public static ClassPB retourner2ProcessBuilder(String p01,
                                    String p02,
                                    String p03,
                                    String p04,
                                    String p05,
                                    String p06,
                                    String p07,
                                    String p08,
                                    String p09,
                                    String p10) {
        // ProcessBuilder pb01 = new ProcessBuilder("/usr/bin/javac", "-d", "./out", "../JavaFX_Test01_Hello_Devstory/src/module-info.java", "../JavaFX_Test01_Hello_Devstory/src/application/Main.java");
        ProcessBuilder pb01 = new ProcessBuilder(p01, p02, p03, p04, p05);
        
        // ProcessBuilder pb02 = new ProcessBuilder("/usr/bin/java", "-p", "./out", "-m", "JavaFX_Test01_Hello_Devstory/application.Main");
        ProcessBuilder pb02 = new ProcessBuilder(p06, p07, p08, p09, p10);
        
        try {
            pb01
            .inheritIO()
            .start()
            .waitFor();
        } catch (InterruptedException except) {
            except.printStackTrace();
        } catch (IOException except) {
            except.printStackTrace();
        }
        
        try {
            pb02
            .inheritIO()
            .start()
            .waitFor();
        } catch (InterruptedException except) {
            except.printStackTrace();
        } catch (IOException except) {
            except.printStackTrace();
        }
        
        return new ClassPB(pb01, pb02);
    }

我试着说清楚我的英语。我希望你能理解，因为我翻译了几个句子。

retourner2ProcessBuilder()有10个args：

5用于第一次ProcessBuilder

5用于第二次ProcessBuilder

其目标是：

读取带有所有项目的settings.properties文件，并能够运行我的主要项目。

谢谢。

再见