spring源码问题？org.springframework.core.convert.Property类

[lcs5114386]

org.springframework.core.convert.Property类的方法

// internal helpers

private String resolveName() {
if (this.readMethod != null) {
int index = this.readMethod.getName().indexOf("get");
if (index != -1) {
index += 3;
}
else {
index = this.readMethod.getName().indexOf("is");
if (index == -1) {
throw new IllegalArgumentException("Not a getter method");
}
index += 2;
}
return StringUtils.uncapitalize(this.readMethod.getName().substring(index));
}
else {
int index = this.writeMethod.getName().indexOf("set") + 3;
if (index == -1) {
throw new IllegalArgumentException("Not a setter method");
}
return StringUtils.uncapitalize(this.writeMethod.getName().substring(index));
}
}

这里的 int index = this.writeMethod.getName().indexOf("set") + 3;
if (index == -1) {
throw new IllegalArgumentException("Not a setter method");
}
是不是有问题？