Let's see the following code snippet in Java. public class Main { public static void main(String[] args) { // new Character(' u000d System.out.println("Hello"); } } In the above code, although the only line in the main() method is commented out, it displays the output Hello on the console, even though it looks like that this commented line contains some syntax errors. If th
我们来看看下面的Java代码片段。 public class Main { public static void main(String[] args) { // new Character(' u000d System.out.println("Hello"); } } 在上面的代码中，尽管main()方法中的唯一一行被注释掉了，但它在控制台上显示了输出Hello ，即使看起来这条注释行包含一些语法错误。 如果这行没有注释，它根本不会工作，导致编译时错误。 为什么在这里输出“Hello”？ Java在源代码中解析字符
I recently learned that Unicode is permitted within Java source code not only as Unicode characters (eg. double π = Math.PI; ) but also as escaped sequences (eg. double u03C0 = Math.PI; ). The first variant makes sense to me - it allows programmers to name variables and methods in an international language of their choice. However, I don't see any practical application of the second approa
我最近了解到的Unicode是Java源代码内允许不仅为Unicode字符（例如。 double π = Math.PI;而且还为转义序列（例如。 double u03C0 = Math.PI; 第一个变体对我来说很有意义 - 它允许程序员用他们选择的国际语言命名变量和方法。 但是，我没有看到第二种方法的实际应用。 以下是一些代码示例，用Java SE 6和NetBeans 6.9.1进行了测试： 此代码将打印出3.141592653589793 public static void main(String[] args) { doub
Why can't I use u000D and u000A as CR and LF in Java? It's giving an error when I compile the code: illegal line end in character literal Unicode escapes are pre-processed before the compiler is run. Therefore, if you put u000A in a String literal like this: String someString = "foou000Abar"; It will be compiled exactly as if you wrote: String someString = "foo bar"; Stick to r (c
为什么我不能在Java中使用 u000D和 u000A作为CR和LF？ 编译代码时发生错误： illegal line end in character literal 编译器运行之前预处理Unicode转义字符。 因此，如果您将u000A放入像这样的字符串文字中： String someString = "foou000Abar"; 它将完全按照如下方式编译： String someString = "foo bar"; 坚持r （回车; 0x0D ）和n （换行; 0x0A ） 奖金：您可以随时享受这一乐趣，特别是考虑到大多数语法荧光笔的
This question already has an answer here: Why is executing Java code in comments with certain Unicode characters allowed? 8 answers The i++ is on a separate line from the one-line comment. Unicode code point 'u000A' is a line-feed character.
这个问题在这里已经有了答案： 为什么在允许某些Unicode字符的注释中执行Java代码？ 8个答案 i++与单行注释分开。 Unicode代码点' u000A'是一个换行字符。
I'm having some trouble in converting a PNG with Alpha to JPEG from Wiki. This is the image: http://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Radio_SRF_3.svg/500px-Radio_SRF_3.svg.png Original: The converted JPEG file has wrong colors. It's more grey than darker now. This is how I do the conversion: Remove alpha: public static BufferedImage imageFillAlphaWithColor(Buff
我在将Alpha的PNG转换为Wiki的过程中遇到了一些麻烦。 这是图像：http://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Radio_SRF_3.svg/500px-Radio_SRF_3.svg.png 原版的： 转换后的JPEG文件颜色错误。 现在它比黑暗更灰。 这是我如何进行转换： 删除alpha： public static BufferedImage imageFillAlphaWithColor(BufferedImage image, Color fillColor) { if (image.getColorModel().getTransparency()
Sounds like computer science is not your cup of tea. I Strongly recommend you refactor this code and try to figure out why it does what it does. public void print(String ht) { // print array String st = ht.toLowerCase().replaceAll("\s", ""); sent = st.toCharArray(); int[] alphabet = new int[26]; //set all values to 0 for(int i = 0 ; i < alphabet.length ; i++){ a
听起来像计算机科学不是你的一杯茶。 我强烈建议你重构这段代码，并试图找出它为什么会这样做。 public void print(String ht) { // print array String st = ht.toLowerCase().replaceAll("\s", ""); sent = st.toCharArray(); int[] alphabet = new int[26]; //set all values to 0 for(int i = 0 ; i < alphabet.length ; i++){ alphabet[i] = 0; } //Loop through all characters
I am calling an Oracle stored procedure in which I have an array of a custom type object. Below is my code. Type Object: create or replace type xx_wf_svc_ntf_attr_record is object (CITY varchar(4000), COUNTRY number, POP number,
我正在调用一个Oracle存储过程，其中有一个自定义类型对象的数组。 以下是我的代码。 类型对象： create or replace type xx_wf_svc_ntf_attr_record is object (CITY varchar(4000), COUNTRY number, POP number, CURRENT_DATE date);
This question already has an answer here: How to add JAR libraries to WAR project without facing java.lang.ClassNotFoundException? Classpath vs Build Path vs /WEB-INF/lib 4 answers Probably you aren't deploying the oracle driver with your application. You have several options: You can place the driver jars in your WEB-INF/lib folder You export it with your application. -> Right
这个问题在这里已经有了答案： 如何将JAR库添加到WAR项目而不面临java.lang.ClassNotFoundException？ 类路径vs构建路径vs / WEB-INF / lib 4答案 可能你没有在应用程序中部署oracle驱动程序。 你有几个选择： 您可以将驱动程序jar放入您的WEB-INF/lib文件夹中 你用你的应用程序导出它。 - >右键单击Project - > Build Path - > Configure Build Path... - > Order and Export - >检查驱动程序。
I am trying to execute following code. import java.io.File; import org.semanticweb.owlapi.apibinding.OWLManager; import org.semanticweb.owlapi.model.AddAxiom; import org.semanticweb.owlapi.model.IRI; import org.semanticweb.owlapi.model.OWLAxiom; import org.semanticweb.owlapi.model.OWLClass; import org.semanticweb.owlapi.model.OWLDataFactory; import org.semanticweb.owlapi.model.OWLOntology; impo
我正试图执行以下代码。 import java.io.File; import org.semanticweb.owlapi.apibinding.OWLManager; import org.semanticweb.owlapi.model.AddAxiom; import org.semanticweb.owlapi.model.IRI; import org.semanticweb.owlapi.model.OWLAxiom; import org.semanticweb.owlapi.model.OWLClass; import org.semanticweb.owlapi.model.OWLDataFactory; import org.semanticweb.owlapi.model.OWLOntology; import org.semanticw
Why code below gives error C:temp>java Test -cp commons-codec-1.9.jar auth string: xxx Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/co dec/binary/Base64 at Test.main(Test.java:22) Caused by: java.lang.ClassNotFoundException: org.apache.commons.codec.binary.Bas e64 at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1
为什么下面的代码给出错误 C： temp> java test -cp commons-codec-1.9.jar auth string：xxx线程“main”中的异常java.lang.NoClassDefFoundError：org / apache / commons / co dec / binary / Base64 at Test.main（Test .java：22）导致：java.lang.ClassNotFoundException：org.apache.commons.codec.binary.Bas在java.net.URLClassLoader上的e64 $ 1.run（URLClassLoader.java:366）在java.net.URLClassLoader $ 1。 ja