整数を入力し、計算結果を表示する switch case文

public class ren07_1
{
public static void main (String[] args) throws IOException
{
BufferedReader br =
new BufferedReader( new InputStreamReader(System.in));
System.out.print("整数１を入力 > ");
int num1 = Integer.parseInt( br.readLine() );
System.out.print("整数２を入力 > ");
int num2 = Integer.parseInt( br.readLine() );
System.out.print("加(1)、減(2)、乗(3)、除(4)？ > ");
int mode = Integer.parseInt( br.readLine() );
int result;
String modeString;
switch(mode){
case 1:

modeString = "加算";
result = num1 + num2;
break;
case 2:
modeString = "減算";
result = num1 - num2;
break;
case 3:
modeString = "乗算";
result = num1 * num2;
break;
case 4:
modeString = "除算";
if(num2!=0)
result=num1/num2;
else

result=0;
break;
default:
modeString = "";
result = 0;
break;
}
System.out.println("２つの整数の" + modeString + "結果は " + result + " です。");
}
}