我正在尝试将RDFs三元组转换为RDFs四组(添加上下文),下面是我的三元组的图片(输入):
这是我的密码
public static void main(String[] args) {
try {
Model model = RDFDataMgr.loadModel("/Users/mohamedghribi/Downloads/Thesis/csv2rdf-master/csv2rdf-master/examples/cars/last.nt");
DatasetGraph dsg = new DatasetGraphSim
这让我感到惊讶:我能够声明一个名为record的变量,尽管它现在已经成为一个关键字。看看这个:
public class Main {
static class Foo {
void bar() { System.out.println("Foo.bar"); }
}
record R (int a) {}
public static void main(String[] args) {
Foo record = new Foo();
record.bar();
我试图解析一个使用的代码,但是我得到了以下错误:
org.xml.sax.SAXParseException; systemId: http://www.khronos.org/files/collada_schema_1_4.xsd; lineNumber: 1; columnNumber: 50; White spaces are required between publicId and systemId.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(
我似乎找不到这里的错误。显然,所有常量的"final“后面都应该有一个标识符。有人能帮帮忙吗?
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class Letter
{
private static final int 30G_PRICE = 40;
private static final int 50G_PRICE = 55;
private static final int 100G_PRICE
在我在%子句中使用LIKE通配符之前,我所面临的查询一直很好。:-
这很好(用Java印刷):-
select acc.*, service.*
from com_accounts acc
left join com_subscriptions service on acc.cust_id = service.cust_id
where 1=1 and UPPER(acc.first_name) LIKE UPPER(?)
这会引发一个错误(从Java代码中打印):-
select acc.*, service.*
from com_accounts a
我对Java非常陌生,在编译时遇到了以下两个错误:
stringConvert3.java:29: illegal start of expression
public static void main (String [] args) throws Exception //Main
^
stringConvert3.java:57: ';' expected
private class InnerToLowerCaseString //Second class (Inner) to convert to lower case
^
下面是我正在工作
我对如何在子类中创建方法感到困惑。我的头撞在砖墙上,甚至不知道该怎么说这个问题。
import java.io.*;
public class A {
public double method1(double x, double y) { return 1.0; }
}
class B extends A {
//subclass method to be placed after this line
}
public double method1(double x, double y) { ... }
public int method1(double x, dou