java - 如何打印对象的内容

Question

当我启动我的程序时，它会给我一个对象的链接，而我想获取内容。我的错误在哪里？

我认为问题在于 ReaderXls.class 中的 storage.addRecord(record)。

结果:

 Reading is over 
 Start reading from Storage
 work2obj.Record@2910d926

.

  public class Start {
            public static void main(String[] args) {
                System.out.println("Start reading from Xls");
                ReaderXls read = new ReaderXls();
                Storage storage;
                storage = read.ReadXls("Text1obj",0,1);
                System.out.println("Reading is over");
                System.out.println("Start reading from Storage");
                System.out.println(storage.getRecord(1));
            }
        }

.

  public class Storage
    {
        List<Record> record;
        public Storage(){
            this.record = new ArrayList<Record>();
        }

.

  public Record getRecord(int number){
            return this.record.get(number);
        }    
      }

.

  public class ReaderXls {
  public Storage ReadXls(String sfilename,int firstColumn, int lastColumn){
            Storage storage = new Storage();
            try {      
  Record record = new Record(j, Integer.parseInt(ContentCount), RowContent);
                    storage.addRecord(record);
  }
 }

Answer 1

您应该实现 toString Record 中的方法类返回包含要显示的数据的字符串。

默认情况下，因为您的类没有实现 toString , Object.toString()被调用，返回 <the name of the class>@<the object's hashcode>