public static int getValue(int i) {
int result = 0;
switch (i) {
case 1:
result = result + i;
case 2:
result = result + i * 2;
case 3:
result = result + i * 3;
}
return result;
}
public static int getValue(int i) { int result = 0; switch (i) { case 1: result = result + i; case 2: //i=2,进入case2 result = result + i * 2; //result = 4 case 3: //因为没有break,会继续向下执行,result= 4+2*3 = 10 result = result + i * 3; } return result; }