Readline interface: Difference between revisions
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Line 181:
- readline_interface.hello
>exit</pre>
=={{header|Java}}==
{{trans|C#}}
<lang java>import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
public class ReadlineInterface {
private static LinkedList<String> histArr = new LinkedList<>();
private static void hist() {
if (histArr.isEmpty()) {
System.out.println("No history");
} else {
histArr.forEach(cmd -> System.out.printf(" - %s\n", cmd));
}
class Crutch {}
histArr.add(Crutch.class.getEnclosingMethod().getName());
}
private static void hello() {
System.out.println("Hello World!");
class Crutch {}
histArr.add(Crutch.class.getEnclosingMethod().getName());
}
private static void help() {
System.out.println("Available commands:");
System.out.println(" hello");
System.out.println(" hist");
System.out.println(" exit");
System.out.println(" help");
class Crutch {}
histArr.add(Crutch.class.getEnclosingMethod().getName());
}
public static void main(String[] args) throws IOException {
Map<String, Runnable> cmdMap = new HashMap<>();
cmdMap.put("help", ReadlineInterface::help);
cmdMap.put("hist", ReadlineInterface::hist);
cmdMap.put("hello", ReadlineInterface::hello);
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter a command, type help for a listing.");
while (true) {
System.out.print(">");
String line = in.readLine();
if ("exit".equals(line)) {
break;
}
cmdMap.getOrDefault(line, ReadlineInterface::help).run();
}
}
}</lang>
=={{header|Julia}}==
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