Question

我正在用x10语言做一个项目。它的后端是java。我需要将一些有用的java库导入x10类。但是当我使用ant构建项目时，它会产生构建错误，说明找不到导入的类名。然后我尝试将它们导入到java类中。我成功了。

但我需要的是将它们导入x10类。

Answer 1

您需要做两件事。

在x10程序中，添加import声明（例如import java.util.HashMap）
在调用x10c编译器时，确保要使用的Java类的.class文件位于sourcepath中。如果要导入属于Java标准库（java。*）的类，则应该可以正常工作。如果要导入自己的类，则需要使用-cp命令行参数告诉x10c类。

在samples / java.interop目录中有一些X10 / Java interop的例子可能有所帮助。以下是其中一个供参考：

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;


/**
 * An example to show how to use Apache HttpComponents HttpClient 4.2.1 in X10.
 * Compile as "x10c -cp httpclient-4.2.1.jar:httpcore-4.2.1.jar HttpClient.x10"
 * Run as as "x10 -cp .:httpclient-4.2.1.jar:httpcore-4.2.1.jar:commons-logging-1.1.1.jar HttpClient"
 */
public class HttpClient {
    static val url = "http://targethost/";

    public static def main(Rail[String]):void {
        finish for (p in Place.places()) {
            at (p) async {
                val ncores = java.lang.Runtime.getRuntime().availableProcessors();
                Console.OUT.println("Place " + p.id + " has " + ncores + " cores.");
                finish for (var i:Int = 0n; i < ncores; ++i) {
                    val coreid = i;
                    async {
                        Console.OUT.println("Place " + p.id + " core " + coreid + " start.");
                        val httpclient = new DefaultHttpClient();
                        val httpGet = new HttpGet(url);
                        while (true)
                        {
                            val response1 = httpclient.execute(httpGet);
                            /*
                             * The underlying HTTP connection is still held by the response object 
                             * to allow the response content to be streamed directly from the network socket. 
                             * In order to ensure correct deallocation of system resources 
                             * the user MUST either fully consume the response content  or abort request 
                             * execution by calling HttpGet#releaseConnection().
                             */
                            try {
                                Console.OUT.println(response1.getStatusLine());
                                val entity1 = response1.getEntity();
                                /* do something useful with the response body and ensure it is fully consumed */
                                EntityUtils.consume(entity1);
                            } finally {
                                httpGet.releaseConnection();
                            }
                        }
                    }
                }
            }
        }
    }
}

Answer 2

x10 2.6.1在Java 8中可以通过这种方式直接使用。

（Java 9/10具有一个可以更改内容的模块系统。）

将java库导入x10类

2 个答案: