我有一个名为Record的对象类,其中包含一个Data类对象的矢量
对象类Data除了两个变量外什么都没有

Object value;
String name;


我在Record类中重写equals方法,如下所示:

public boolean equals(Object obj) {
    boolean check = true;
    for(int i=0; i<this.coloumnsOfData.size();i++) {
        System.out.println( ((Record) obj).coloumnsOfData.get(i).name + " OBJECT " + ((Record) obj).coloumnsOfData.get(i).value );
        System.out.println( coloumnsOfData.get(i).name + " THIS " + coloumnsOfData.get(i).value );
        if( !((((Record) obj).coloumnsOfData.get(i).name).equals(this.coloumnsOfData.get(i).name))   || !((((Record) obj).coloumnsOfData.get(i).value).equals(this.coloumnsOfData.get(i).value))) {

            check=false;
        }
    }


    return (obj instanceof Record && check);
}


我将HashSet初始化如下:
Set<Record> answer= new HashSet<Record>()
并开始测试

            Record r1 = new Record();
            r1.coloumnsOfData.add(new Data(new Double( 1.5 ),"gpa"));
            r1.coloumnsOfData.add(new Data(new String("John"),"name"));
            r1.coloumnsOfData.add(new Data(new Integer( 2 ),"id"));

            Record r2 = new Record();
            r2.coloumnsOfData.add(new Data(new Double( 1.5 ),"gpa"));
            r2.coloumnsOfData.add(new Data(new String("John"),"name"));
            r2.coloumnsOfData.add(new Data(new Integer( 2 ),"id"));
            System.out.println(r1.equals(r2)); //RETURNS TRUE
            answer.add(r1);
            System.out.println(answer.contains(r2)); //RETURNS FALSE


任何帮助了解问题所在的帮助将不胜感激。

最佳答案

尝试也重写hashCode方法。它应该工作。
您可以在此处找到说明:
HashSet contains() method

09-11 18:39
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