Sample method for converting decimal numbers into roman (Java method)

SampleDecimalToRoman.java

public static String integerToRomanConvert(int input){
    if(input < 1 || input > 10000){
        return "Invalid Input";
    }
    String s ="";
    while(input >= 1000){
        s+="M";
        input -= 1000;
    }
    while(input >= 900){
        s+="CM";
        input -= 900;
    }
    while(input >= 500){
        s+="D";
        input -= 500;
    }
    while(input >= 400){
        s+="CD";
        input -= 400;
    }
    while(input >= 100){
        s+="C";
        input -= 100;
    }
    while(input >= 90){
        s+="XC";
        input -= 90;
    }
    while(input >= 50){
        s+="L";
        input -= 50;
    }
    while(input >= 40){
        s+="XL";
        input -= 40;
    }
    while(input >= 10){
        s+="X";
        input -= 10;
    }
    while(input >= 9){
        s+="IX";
        input -= 9;
    }
    while(input >= 5){
        s+="V";
        input -= 5;
    }
    while(input >= 4){
        s+="IV";
        input -= 4;
    }
    while(input >= 1){
        s+="I";
        input -= 1;
    }
    return s;
}