public class test{
    
    public static void main(String[] args){
        List<Operation> arrList = new ArrayList<>(Arrays.asList(
            new Operation(100,"text1"), new Operation(110,"text1"), new Operation(150,"text2"), new Operation(100,"texttext"), new Operation(100,"text1")));
        arrList.forEach(System.out::println);
        System.out.println("-----------------");
        arrList.stream().distinct().forEach(System.out::println);
    }
    static class Operation {
        int code;
        String text;
        public Operation(int code,String text){
            this.code=code;
            this.text=text;
        }

        @Override
        public int hashCode(){
            int hash=7;
            return hash;
        }

        @Override
        public boolean equals(Object obj){
            if(this==obj){
                return true;
            }
            if(obj==null){
                return false;
            }
            if(getClass()!=obj.getClass()){
                return false;
            }
            final Operation other=(Operation)obj;
            if(this.code!=other.code){
                return false;
            }
            if(!Objects.equals(this.text,other.text)){
                return false;
            }
            return true;
        }
        @Override
        public String toString(){
            return "Operation{"+"code="+code+", text="+text+'}';
        }   
    }
}