Java 生成的Xpand代码';编辑器不包含主类型';。但是我有一个主要的方法
我试图理解使用xText和xPand生成dsl代码 我已经在eclipse中打开了statemachine xText示例,并作为一个新的eclipse应用程序运行。然后,我在src中创建了一个包含test.statemachine文件的java,并将提供的代码复制到其中 然后在src gen文件夹中生成以下.java文件:Java 生成的Xpand代码';编辑器不包含主类型';。但是我有一个主要的方法,java,eclipse,dsl,xtext,xpand,Java,Eclipse,Dsl,Xtext,Xpand,我试图理解使用xText和xPand生成dsl代码 我已经在eclipse中打开了statemachine xText示例,并作为一个新的eclipse应用程序运行。然后,我在src中创建了一个包含test.statemachine文件的java,并将提供的代码复制到其中 然后在src gen文件夹中生成以下.java文件: import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamR
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class testing {
public static void main(String[] args) {
new testing().run();
}
protected void doUnlockPanel() {
System.out.println("Executing command unlockPanel (PNUL)");
}
protected void doLockPanel() {
System.out.println("Executing command lockPanel (PNLK)");
}
protected void doLockDoor() {
System.out.println("Executing command lockDoor (D1LK)");
}
protected void doUnlockDoor() {
System.out.println("Executing command unlockDoor (D1UL)");
}
protected void run() {
boolean executeActions = true;
String currentState = "idle";
String lastEvent = null;
while (true) {
if (currentState.equals("idle")) {
if (executeActions) {
doUnlockDoor();
doLockPanel();
executeActions = false;
}
System.out.println("Your are now in state 'idle'. Possible events are [doorClosed].");
lastEvent = receiveEvent();
if ("doorClosed".equals(lastEvent)) {
currentState = "active";
executeActions = true;
}
}
if (currentState.equals("active")) {
if (executeActions) {
executeActions = false;
}
System.out.println("Your are now in state 'active'. Possible events are [drawOpened, lightOn].");
lastEvent = receiveEvent();
if ("drawOpened".equals(lastEvent)) {
currentState = "waitingForLight";
executeActions = true;
}
if ("lightOn".equals(lastEvent)) {
currentState = "waitingForDraw";
executeActions = true;
}
}
if (currentState.equals("waitingForLight")) {
if (executeActions) {
executeActions = false;
}
System.out.println("Your are now in state 'waitingForLight'. Possible events are [lightOn].");
lastEvent = receiveEvent();
if ("lightOn".equals(lastEvent)) {
currentState = "unlockedPanel";
executeActions = true;
}
}
if (currentState.equals("waitingForDraw")) {
if (executeActions) {
executeActions = false;
}
System.out.println("Your are now in state 'waitingForDraw'. Possible events are [drawOpened].");
lastEvent = receiveEvent();
if ("drawOpened".equals(lastEvent)) {
currentState = "unlockedPanel";
executeActions = true;
}
}
if (currentState.equals("unlockedPanel")) {
if (executeActions) {
doUnlockPanel();
doLockDoor();
executeActions = false;
}
System.out.println("Your are now in state 'unlockedPanel'. Possible events are [panelClosed].");
lastEvent = receiveEvent();
if ("panelClosed".equals(lastEvent)) {
currentState = "idle";
executeActions = true;
}
}
if ("doorClosed".equals(lastEvent)) {
System.out.println("Resetting state machine.");
currentState = "idle";
executeActions = true;
}
}
}
private String receiveEvent() {
System.out.flush();
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
return br.readLine();
} catch (IOException ioe) {
System.out.println("Problem reading input");
return "";
}
}
}
但是,如果出现“编辑器不包含主类型”的错误,这将不会很有趣,但从我所看到的情况来看,存在包含生成的
测试的src gen
文件夹。默认情况下,java
是一个普通文件夹,而不是“源文件夹”。因此,So必须打开该文件夹上的上下文菜单,并选择“构建路径”->“用作源文件夹”。之后,您可以执行Java程序。测试
包含main。不确定编辑器是什么,因为您没有包括它……它也在Java项目的Java构建路径中吗?您能声明一个包吗(否则它不会在现代JRE上运行)?