javac

问题 When using javac (or the ant task ), the error message does not include the entire filepath, it only includes the file name. For example, $ javac src/path/to/Filename.java Filename.java:1: package foo.bar does not exist import foo.bar.Baz; ^ What I would like is, $ javac src/path/to/Filename.java src/path/to/Filename.java:1: package foo.bar does not exist import foo.bar.Baz; ^ My problem is that vim quickfix does not work if it's not given the entire filepath, not just the filename. With just

问题 Interfaces: interface PublicCloneable { Object clone(); } interface HasPosition { // doesn't matter } Attempt to use intersection type: @SuppressWarnings("unchecked") <E extends PublicCloneable & HasPosition> E cloneAndIncrementPosition(E elem) { final E clone = (E)elem.clone(); // rest omitted } Attempt to compile with javac 1.8.0_60 : $ javac xx.java xx.java:13: error: clone() in Object cannot implement clone() in PublicCloneable <E extends PublicCloneable & HasPosition> E

问题 When shifting through java call graph generated by libraries like DependencyFinder and java-callgraph, I found out that java compiler generate names for anonymous functions, inner classes, etc. I've found out the meaning of a couple of them (please correct if I'm wrong): org.example.Bar$Foo refers to Foo , which is an inner class of org.example.Bar . org.example.Bar$1 refers to an anonymous class declared inside one of the methods of org.example.Bar . org.example.Bar.lambda$spam$1() refers to

问题 I want to pass any enum value to method in utility class and get another enum value of same enum type. Something like this: public class XMLUtils { public static Enum<?> getEnumAttribute(Element element, String name, Enum<?> defaultValue) { if (element.hasAttribute(name)) { String valueName = element.getAttribute(name); // search for value for (Enum<?> value: defaultValue.getClass().getEnumConstants()) if (value.toString().equalsIgnoreCase(valueName)) return value; } // not found, return

问题 I'm making my first steps toward learning JSF. I found this interesting book called "Core JavaServer Faces Third Edition". Trying to compile the first example, you can download the source code from: http://horstmann.com/corejsf/. When I type the following on the command-line javac UserBean.java I get errors: package javax.inject does not exist package javax.enterprise.context doe not exist I have downloaded Java EE, Ant and GlassFish. Here is a snap of my command-line: C:\JSF-Tutorial

问题 I am experiencing a very annoying problem to me, imagine I compile the file FooBar.java: $ javac FooBar.java It compiles sucefully and then I run it as usual: $ java FooBar < in.txt I get the output as expected, the deal is, if I change the source code (FooBar.java) to print something else and compile it again I get the same output as the first time! This is really making me mad... is there any cache for the javac? Even if I delete FooBar.class and recompile I get the output from the early

问题 Let's say I have the following folder structure: \src\com\proj\pp1\stuff where com.proj.pp1 and com.proj.pp1.stuff are the two packages I have: -src -com -proj -pp1 tester.java -stuff some other .java's Being the main function in tester.java, and using the classes declared in /stuff. In tester.java I declare the imports that way: package com.proj.pp1; import com.proj.pp1.*; And in all the files declared under stuff: package com.proj.pp1.stuff; without any imports. I'm able to get the .class's

问题 Hi and thanks for reading, after usually working with C# I tried writing some java code yesterday to process an XML file. I didn't use an IDE or anything, just Notepad++, SDK and a lot of Google :) I needed to include some jar files for which I found out, that one needs to set the classpath as a command line parameter to find the jar file. That worked well: javac -cp "./metadata-extractor-2.9.1.jar;./xmpcore-5.1.2.jar" DescribeIt.java Although using the same syntax when running it with java

问题 When i try to build my project i got error line custom_rules.xml:63 is: line 78 is : fork="${need.javac.fork}"> Parameters of build are -Dsdk.dir=C:\Users\bou\sdk -Ddeploy.env=preprod_artiste1 -verbose after build i want replace folder res by another res in res-xxxxxx\res-artiste1\res BUILD FAILED C:\Users\bou\native-android\custom_rules.xml:63: The following error occurred while executing this line: C:\Users\bou\native-android\custom_rules.xml:78: Compile failed; see the compiler error

问题 Error:Execution failed for task ':app:compileDebugJavaWithJavac'. Compilation failed; see the compiler error output for details how to fix this error please ans me my build.gradle apply plugin: 'com.android application' android { compileSdkVersion 25 buildToolsVersion '25.0.2' defaultConfig { applicationId "com.example.mayur.mahadev" minSdkVersion 22 targetSdkVersion 25 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes {