do-while loop to discard any unwanted character remaining in the input buffer

gistfile1.txt

package chapter3;

public class TryThis3_2 {
	public static void main(String args[])
	    throws java.io.IOException{
		char choice,ignore;
		
		do {
			System.out.println("1.if 2.switch 3.for 4.while 5.do-while\nchooose one");
			choice = (char)System.in.read();
			do {
				ignore = (char)System.in.read();
			}while(ignore != '\n');
		}while(choice<'1'|choice>'5');
		System.out.println("\n");
		
		switch(choice) {
		case'1': System.out.println("if blablabal"); break;
		case'2': System.out.println("switch blabal"); break;
		case'3': System.out.println("for balbal"); break;
		case'4': System.out.println("while balbal"); break;
		case'5': System.out.println("do-while blabla"); break;
		}
	}

}