技术问答java涓璼tream鐨刦ilter濡備綍浣跨敤 - 扬州沐宇科技

鍦?Java 涓紝Stream 鐨?filter 鏂规硶鍙互鐢ㄤ簬绛涢€夊嚭绗﹀悎鐗瑰畾鏉′欢鐨勫厓绱犮€俧ilter 鏂规硶鎺ユ敹涓€涓?Predicate 鎺ュ彛鐨勫疄鐜帮紝鐢ㄤ簬瀹氫箟杩囨护鏉′欢銆備緥濡傦紝涓嬮潰鏄竴涓畝鍗曠殑渚嬪瓙锛?/p>

List<String> names = Arrays.asList("Alice", "Bob", "Charlie", "David", "Eve");

List<String> filteredNames = names.stream()
                                   .filter(name -> name.length() > 4)
                                   .collect(Collectors.toList());

System.out.println(filteredNames); // 杈撳嚭 [Alice, Charlie]

鍦ㄨ繖涓緥瀛愪腑锛屾垜浠鍏堝皢鍘熷鐨勫瓧绗︿覆鍒楄〃杞崲涓轰竴涓?Stream锛岀劧鍚庝娇鐢?filter 鏂规硶淇濈暀闀垮害澶т簬 4 鐨勫瓧绗︿覆锛屾渶鍚庝娇鐢?collect 鏂规硶灏嗙粨鏋滄敹闆嗗埌涓€涓柊鐨勫垪琛ㄤ腑銆?/p>

闇€瑕佹敞鎰忕殑鏄紝filter 鏂规硶涓嶄細淇敼鍘熷鐨?Stream锛岃€屾槸杩斿洖涓€涓柊鐨?Stream锛屽洜姝ゅ彲浠ラ摼寮忚皟鐢ㄥ涓?filter 鏂规硶鏉ヨ繘琛屽娆＄瓫閫夈€?/p>