Transaction.java

public class Transaction {
    private String type;
    private double amount;
    private String detail;
    private long timestamp;

    //constructor 1
    public Transaction(String type,double amount,String detail){
        this.type=type;
        this.amount=amount;
        this.detail=detail;
        this.timestamp=System.currentTimeMillis();
    }
    //access type
    public String getType(){
        return type;
    }
    //access amount
    public double getAmount(){
        return amount;
    }
    //access Timestamp
    public long getTimestamp(){
        return timestamp;
    }
    public String getDetail(){
        return detail;
    }
    //overriding toString
    public String toString(){
        return type+"|Rs."+amount+"|"+detail;
    }
}