A simple command line help interactive demo.
/**
* Java Help system
* @author Notus(hehe_xiao@qq.com)
* @date 2017-11-20
* @version v0.1
*/
package com.test01;
import java.io.IOException;
public class Help {
public static void main(String[] args)
throws IOException{
System.out.println("Help on:");
System.out.println(" 1. if");
System.out.println(" 2. switch");
char choice = (char)System.in.read();
switch(choice){
case '1':
System.out.println("The if:\n");
System.out.println("if(condition) statement;");
System.out.println("else statement;");
break;
case '2':
System.out.println("The switch:\n");
System.out.println("switch(expression) {");
System.out.println(" case constant:");
System.out.println(" statement sequence");
System.out.println(" break;");
System.out.println(" // ...");
System.out.println("}");
break;
default:
System.out.println("Selection not found.");
}
}
}