1、lambda表达式可访问外部本地final变量
final int num = 1; Converter<Integer, String> stringConverter = (from) -> String.valueOf(from + num); stringConverter.convert(2); // 3
2、与访问本地变量相反，成员变量和静态变量可以通过lambda表达式读写。这种访问变量的方式也实现在匿名变量中:
class Lambda4 {
static int outerStaticNum;
int outerNum;
void testScopes() {
Converter<Integer, String> stringConverter1 = (from) -> {
outerNum = 23;
return String.valueOf(from);
};
Converter<Integer, String> stringConverter2 = (from) -> {
outerStaticNum = 72;
return String.valueOf(from);
};
}
}以上是怎么用java Lambda访问变量的详细内容。更多信息请关注PHP中文网其他相关文章！
