I often find myself doing something like this: list.stream().min(new Comparator<>() { @Override public int compare(E a, E b) { return Double.compare(f(a),f(b)); } }) where f is a computation intensive function. This requires twice as many evaluations of f as are actually necessary. I'd prefer to list.stream().mapToDouble(f).min() but then I don't know how
我经常发现自己在做这样的事情: list.stream().min(new Comparator<>() { @Override public int compare(E a, E b) { return Double.compare(f(a),f(b)); } }) 其中f是一个计算密集型函数。 这需要对实际需要的f两倍的评估。 我更喜欢 list.stream().mapToDouble(f).min() 但后来我不知道如何获得这个最小值对应的原始元素。 一个丑陋的解决方法是 class WithF<E>{ private final
I'm trying to use Java 1.8 with lambda expressions with Idea UI Designer , I have in maven: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>ideauidesigner-maven-plugin</artifactId> <executions> <execution> <goals> <goal>javac2</goal> </goals> </ex
我正在尝试使用带有Idea UI Designer lambda表达式的Java 1.8 ,我在maven中使用了: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>ideauidesigner-maven-plugin</artifactId> <executions> <execution> <goals> <goal>javac2</goal> </goals> </execution>
Disclaimer I know we shouldn't use HttpClient on Android anymore In API 23 we have option to use useLibrary 'org.apache.http.legacy' I'd like to continue using HttpClient (also I maintain libraries and projects based on it) however, with API 23 the classes are gone. Well not gone with useLibrary workaround, but cannot be used to develop any further (classes don't autoc
放弃 我知道我们不应该在Android上使用HttpClient了 在API 23中,我们可以选择使用useLibrary 'org.apache.http.legacy' 我想继续使用HttpClient(同时我也维护基于它的库和项目),但是使用API 23,这些类已经消失了。 那么没有去与useLibrary解决方法,但不能用于进一步发展(类不自动完成,一切都显示为无效的代码) 我们也可以选择使用HttpClient提供的HttpClient 4.3.5.1的 Android分支,但它不提供And
I am trying to read a css file, find out the css classes and their definition and then save it in a csv file with its class name and description. Using Java, the following I have css file, common.css. /* CSS Document */ .Page { background-color: #F4EEE0; background-image: none; margin: 0px 0px 0px 0px; scrollbar-face-color: #DEAC64; scrollbar-highlight-color: #FFFFFF;
我正在尝试读取一个css文件,找出css类和它们的定义,然后用它的类名和描述将它保存在一个csv文件中。 使用Java,下面我有css文件common.css。 /* CSS Document */ .Page { background-color: #F4EEE0; background-image: none; margin: 0px 0px 0px 0px; scrollbar-face-color: #DEAC64; scrollbar-highlight-color: #FFFFFF; scrollbar-shadow-color: #805822; scrollbar-3dlight-color: #B4
I'm trying to get the rgb value of a color with alpha, meaning make it full opaque with different red, green and blue values. For example, Color.argb(204, 40, 40, 40) // I have this color Color.rgb(48, 48, 48) // I expect this value I've tried converting argb to HEX, and after HEX to rgb, but doesn't work. Your input is a translucent color and you expect a slightly brighter outp
我试图用alpha获得颜色的rgb值,这意味着使用不同的红色,绿色和蓝色值完全不透明。 例如, Color.argb(204, 40, 40, 40) // I have this color Color.rgb(48, 48, 48) // I expect this value 我已经尝试将argb转换为HEX,并且在将HEX转换为rgb后,但不起作用。 您的输入是半透明的颜色,并且您希望输出稍微更亮。 这可以通过将输入叠加在白色上来实现。 support-v4库包含ColorUtils.compositeColors ,它ColorUtils.c
I want to get response after post data but it fails. I want to create a login system, I have successfully submited data to php file, everything is working fine now I want to get response from same function but I'm unable to know where the issue is. Here is the Java function: public class PostDataGetRes extends AsyncTask<String, String, String> { protected void onPreExecute(
我想在发布数据后得到回复,但失败。 我想创建一个登录系统,我已经成功地将数据提交到php文件,一切工作正常,现在我想从相同的功能得到响应,但我无法知道问题出在哪里。 这是Java函数: public class PostDataGetRes extends AsyncTask<String, String, String> { protected void onPreExecute() { super.onPreExecute(); } @Override protected String doInBackgrou
I have an integer that was generated from an android.graphics.Color The Integer has a value of -16776961 How do I convert this value into a hex string with the format #RRGGBB Simply put: I would like to output #0000FF from -16776961 Note: I do not want the output to contain an alpha and i have also tried this example without any success 掩码确保你只能得到RRGGBB,并且%06X给你零填充十六进
我有一个从android.graphics.Color生成的整数 Integer的值为-16776961 如何将此值转换为格式为#RRGGBB的十六进制字符串 简而言之:我想从-16776961输出#0000FF 注意:我不希望输出包含alpha,我也尝试过这个例子,但没有取得任何成功 掩码确保你只能得到RRGGBB,并且%06X给你零填充十六进制(总是6个字符长): String hexColor = String.format("#%06X", (0xFFFFFF & intColor)); 尝试Integer.toHexString()
How can I use Lombok in conjunction with my @XmlElement tags so that I can unmarshall the object? I have about 20 properties, so I'm looking to not write an explicit getter and setter for each with the XmlElement tags on the setters. 这完成了工作: @Data @XmlRootElement(name = "root") @XmlAccessorType(XmlAccessType.FIELD) // UPDATE: Need this or else exception public class Data {
如何将Lombok与我的@XmlElement标签一起使用,以便我可以解组该对象? 我有大约20个属性,所以我正在寻找不要为setter上的每个XmlElement标签写明确的getter和setter。 这完成了工作: @Data @XmlRootElement(name = "root") @XmlAccessorType(XmlAccessType.FIELD) // UPDATE: Need this or else exception public class Data { @XmlElement(name = "test") public double testData; }
I am trying to upload multile files using FormData and spring. HTML: <input type="file" name="img" multiple id="upload-files"> JS code: var ajaxData = new FormData(); var files = $('#upload-files').prop('files'); for(var i=0;i<files.length;i++){ ajaxData.append('file['+i+']', files[i]); } ajaxData.append("file", files); $http.post('../rest/upload', ajaxData, { headers: {'Con
我正在尝试使用FormData和spring上载multile文件。 HTML: <input type="file" name="img" multiple id="upload-files"> JS代码: var ajaxData = new FormData(); var files = $('#upload-files').prop('files'); for(var i=0;i<files.length;i++){ ajaxData.append('file['+i+']', files[i]); } ajaxData.append("file", files); $http.post('../rest/upload', ajaxData, { headers: {'Content-Type': un
I am new to Maven. On Eclipse I am getting following error in pom.xml :- "Multiple annotations found at this line: CoreException: Could not get the value for parameter compilerId for plugin execution default-testCompile: TypeNotPresentException: Type org.apache.maven.plugin.compiler.TestCompilerMojo not present: UnsupportedClassVersionError: org/apache/maven/plugin/compiler/TestCompiler
我是Maven的新手。 在Eclipse上,我在pom.xml中遇到以下错误: - “在这一行找到多个注释: CoreException:无法获取插件执行参数compilerId的值default-testCompile:TypeNotPresentException:类型org.apache.maven.plugin.compiler.TestCompilerMojo不存在:UnsupportedClassVersionError:org / apache / maven / plugin / compiler / TestCompilerMojo:不支持的主要.minor版本51.0 插件执行不包含在生命周期配置中