一个List对象，想把特定的值排在最前面进行处理

今天遇到一个需求，要把list中的某些特定的值排在最前面处理，所以就要对list进行排序，搜索了一下进行总结

首先对List<String> 根据特定的值进行排序

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List<String> list = Arrays.asList("apple", "banana", "cherry", "date", "sss", "fig");     List<String> specificValues = Arrays.asList("fig", "date");     // 指定的特定值     list.sort((a, b) -> {         if (specificValues.contains(a)) {             // a在指定值列表中，应排在前面             return -1;         } else if (specificValues.contains(b)){             // b在指定值列表中，应排在前面             return 1;         } else {             // 其他情况保持不变             return 0;          }     });     System.out.println(list);

　然后对一个List对象根据特定的值进行排序

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首先去写一个简单的类<br>    @Data     public static class Student{         private String name;         private String orderNo;         private int classNum;         public Student(String name, String orderNo, int i) {             this.name = name;             this.orderNo = orderNo;             this.classNum = classNum;         }     }     然后main方法进行验证  　　　　List<Student> studentList = new ArrayList<Student>();         studentList.add(new Student("xiaopang","SN005",1));         studentList.add(new Student("xiaopang","SN002",1));         studentList.add(new Student("xiaopang","SN004",1));         studentList.add(new Student("xiaopang","SN001",1));         studentList.add(new Student("xiaopang","AN003",1));         studentList.add(new Student("xiaopang","AN001",1));         studentList.add(new Student("xiaopang","AN002",1));           // SN开头的再前面排列         studentList.sort((student1, student2) -> {             if (student1.getOrderNo().contains("SN") && student2.getOrderNo().contains("SN")) {                 return student1.getOrderNo().compareTo(student2.getOrderNo());             } else if (student1.getOrderNo().contains("SN") && !student2.getOrderNo().contains("SN")) {                 return -1;             } else if (!student1.getOrderNo().contains("SN") && student2.getOrderNo().contains("SN")) {                 return 1;             } else {                 return student1.getOrderNo().compareTo(student2.getOrderNo());             }         });         studentList.forEach(e->{             System.out.println(e.toString());         });