java - Eclipse 中的控制台不显示输出

Question

我在 Eclipse 中的控制台窗口中遇到问题，因为它没有显示真实的输出。 (标准输出)

例如当执行此程序时:

public class delila {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("Hello World");
    }
}

Eclipse 的控制台显示如下输出:

 Eclipse Compiler for Java(TM) v20150120-1634, 3.10.2 Copyright IBM Corp 2000, 2013. All rights reserved. Usage:   If directories are specified, then their source contents are compiled. Possible options are listed below. Options enabled by default are prefixed with '+'. Classpath options:    -cp -classpath                        specify location for application classes and sources.                       Each directory or file can specify access rules for                       types between '[' and ']' (e.g. [-X] to forbid                       access to type X, [~X] to discourage access to type X,                       [+p/X;-p/*] to forbid access to all types in package p                       but allow access to p/X)    -bootclasspath                        specify location for system classes. Each directory or                       file can specify access rules for types between '['                       and ']'    -sourcepath                        specify location for application sources. Each directory                       or file can specify access rules for types between '['                       and ']'. Each directory can further specify a specific                       destination directory using a '-d' option between '['                       and ']'; this overrides the general '-d' option.                       .class files created from source files contained in a                       jar file are put in the user.dir folder in case no                       general '-d' option is specified. ZIP archives cannot                       override the general '-d' option    -extdirs                        specify location for extension ZIP archives    -endorseddirs                        specify location for endorsed ZIP archives    -d            destination directory (if omitted, no directory is                       created); this option can be overridden per source                       directory    -d none            generate no .class files    -encoding     specify default encoding for all source files. Each                       file/directory can override it when suffixed with                       '['']' (e.g. X.java[utf8]).                       If multiple default encodings are specified, the last                       one will be used. Compliance options:    -1.3               use 1.3 compliance (-source 1.3 -target 1.1)    -1.4             + use 1.4 compliance (-source 1.3 -target 1.2)    -1.5 -5 -5.0       use 1.5 compliance (-source 1.5 -target 1.5)    -1.6 -6 -6.0       use 1.6 compliance (-source 1.6 -target 1.6)    -1.7 -7 -7.0       use 1.7 compliance (-source 1.7 -target 1.7)    -1.8 -8 -8.0       use 1.8 compliance (-source 1.8 -target 1.8)    -source   set source level: 1.3 to 1.8 (or 5, 5.0, etc)    -target   set classfile target: 1.1 to 1.8 (or 5, 5.0, etc)                       cldc1.1 can also be used to generate the StackMap                       attribute Warning options:    -deprecation     + deprecation outside deprecated code (equivalent to                       -warn:+deprecation)    -nowarn -warn:none disable all warnings    -nowarn:[]                       specify directories from which optional problems should                       be ignored    -?:warn -help:warn display advanced warning options Error options:    -err:    convert exactly the listed warnings                                      to be reported as errors    -err:+   enable additional warnings to be                                      reported as errors    -err:-   disable specific warnings to be                                      reported as errors Setting warning or error options using properties file:    -properties    set warnings/errors option based on the properties                          file contents. This option can be used with -nowarn,                          -err:.. or -warn:.. options, but the last one on the                          command line sets the options to be used. Debug options:    -g[:lines,vars,source] custom debug info    -g:lines,source  + both lines table and source debug info    -g                 all debug info    -g:none            no debug info    -preserveAllLocals preserve unused local vars for debug purpose Annotation processing options:   These options are meaningful only in a 1.6 environment.    -Akey[=value]        options that are passed to annotation processors    -processorpath                          specify locations where to find annotation processors.                         If this option is not used, the classpath will be                         searched for processors    -processor                          qualified names of the annotation processors to run.                         This bypasses the default annotation discovery process    -proc:only           run annotation processors, but do not compile    -proc:none           perform compilation but do not run annotation                         processors    -s              destination directory for generated source files    -XprintProcessorInfo print information about which annotations and elements                         a processor is asked to process    -XprintRounds        print information about annotation processing rounds    -classNames                          qualified names of binary classes to process Advanced options:    @            read command line arguments from file    -maxProblems    max number of problems per compilation unit (100 by                       default)    -log         log to a file. If the file extension is '.xml', then                       the log will be a xml file.    -proceedOnError[:Fatal]                       do not stop at first error, dumping class files with                       problem methods                       With ":Fatal", all optional errors are treated as fatal    -verbose           enable verbose output    -referenceInfo     compute reference info    -progress          show progress (only in -log mode)    -time              display speed information     -noExit            do not call System.exit(n) at end of compilation (n==0                       if no error)    -repeat         repeat compilation process  times for perf analysis    -inlineJSR         inline JSR bytecode (implicit if target >= 1.5)    -enableJavadoc     consider references in javadoc    -parameters        generate method parameters attribute (for target >= 1.8)    -genericsignature  generate generic signature for lambda expressions    -Xemacs            used to enable emacs-style output in the console.                       It does not affect the xml log output    -missingNullDefault  report missing default nullness annotation    -? -help           print this help message    -v -version        print compiler version    -showversion       print compiler version and continue Ignored options:    -J         pass option to virtual machine (ignored)    -X         specify non-standard option (ignored                       except for listed -X options)    -X                 print non-standard options and exit (ignored)    -O                 optimize for execution time (ignored)

有谁可以帮助获得真实输出(stdout)“Hello world”，而不是此文本。

谢谢。

编辑:

我使用ctrl+F11运行它

这是 eclipse 的图像:

Answer 1

评论有点长:

具体来说，你是如何运行这个程序的？

显示此文本的控制台的名称是什么？它应该位于 Console 的正下方选项卡和第一行文本上方。

在控制台 View 中有图标选项，当鼠标悬停在它们上时会显示其名称，请使用 X关闭您不想要的控制台。

此外，检查“显示选定的控制台”和“打开控制台”以查看是否有与正在运行/已完成的程序对应的可用控制台

编辑:

看起来像ctrl + F11正在运行名为 Main [5] 的程序作为Java Application而不是delila 。尝试直接运行这个类，右键点击源文件，Run As Java Application 。看看它是如何工作的。