Java8中list.sort的lamba表達式

　　最近寫代碼，需要對list集合排序，IDEA總是黃色警告：

Reports calls to Collections.sort(list, comparator) which could be replaced with list.sort(comparator).

　　樓主多少有點強迫症，那就改吧，修改如下：

            /*Collections.sort(resultList, new Comparator<SystemLog>() {
                    @Override
                    public int compare(SystemLog o1, SystemLog o2) {
                        return o2.getDt().compareTo(o1.getDt());
                    }
                });*/

                resultList.sort(new Comparator<SystemLog>(){
                    @Override
                    public int compare(SystemLog o1, SystemLog o2) {
                        return o2.getDt().compareTo(o1.getDt());
                    }
                });        

　　

　　好嘛，有報了要換Lamba表達式：Reports all anonymous classes which can be replaced with lambda expressions，Lambda syntax is not supported under Java 1.7 or earlier JVMs.

 

 　　那就繼續改吧，

            /*Collections.sort(resultList, new Comparator<SystemLog>() {
                    @Override
                    public int compare(SystemLog o1, SystemLog o2) {
                        return o2.getDt().compareTo(o1.getDt());
                    }
                });*/
                /*resultList.sort(new Comparator<SystemLog>(){
                    @Override
                    public int compare(SystemLog o1, SystemLog o2) {
                        return o2.getDt().compareTo(o1.getDt());
                    }
                });*/

                resultList.sort(((o1, o2) -> o2.getDt().compareTo(o1.getDt())));

　　OK，沒有提示了，代碼也確實簡潔很多。