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这是我的代码。

ConsoleReader console = new ConsoleReader();    
Completer quit = new StringsCompleter("quit");    
Completer subcommands = new ArgumentCompleter(new StringsCompleter("with-number"), new StringsCompleter("with-string"));
Completer add = new ArgumentCompleter(new StringsCompleter("add"), subcommands);
Completer delete = new ArgumentCompleter(new StringsCompleter("delete"), subcommands);    
Completer operations = new ArgumentCompleter(add, delete);    
Completer aggregated = new AggregateCompleter(new StringsCompleter("run"), quit, operations);
console.addCompleter(aggregated);

当我尝试完成命令时，我收到此错误。

Exception in thread "main" java.lang.NullPointerException
        at jline.console.completer.ArgumentCompleter$AbstractArgumentDelimiter.delimit(ArgumentCompleter.java:283)
        at jline.console.completer.ArgumentCompleter.complete(ArgumentCompleter.java:116)
        at jline.console.completer.ArgumentCompleter.complete(ArgumentCompleter.java:152)
        at jline.console.completer.AggregateCompleter$Completion.complete(AggregateCompleter.java:121)
        at jline.console.completer.AggregateCompleter.complete(AggregateCompleter.java:80)
        at jline.console.ConsoleReader.complete(ConsoleReader.java:3261)
        at jline.console.ConsoleReader.readLine(ConsoleReader.java:2621)
        at jline.console.ConsoleReader.readLine(ConsoleReader.java:2269)
        at com.test.jline.JLineExample.main(JLineExample.java:41)

代码预期行为：

> run [TAB]
  add delete
> run del[TAB]ete [TAB]
  with-number with-string

如何修复我的代码以实现这种行为？

附言

我用JLine 2.12.

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0 回答 0