1、lambda表達式可存取外部本地final變數
final int num = 1; Converter<Integer, String> stringConverter = (from) -> String.valueOf(from + num); stringConverter.convert(2); // 3
2、與存取本地變數相反，成員變數和靜態變數可以透過lambda表達式讀寫。這種存取變數的方式也實作在匿名變數中:
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);
};
}
}以上是怎麼用java Lambda存取變數的詳細內容。更多資訊請關注PHP中文網其他相關文章！
