程序包 edu.princeton.cs.algs4

类 Transaction

  • 所有已实现的接口:
    java.lang.Comparable<Transaction>
    public class Transaction
extends java.lang.Object
implements java.lang.Comparable<Transaction>
    The Transaction class is an immutable data type to encapsulate a commercial transaction with a customer name, date, and amount.

    For additional documentation, see Section 1.2 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.

    • 构造器概要

      构造器 
      构造器 说明
      Transaction​(java.lang.String transaction)
      Initializes a new transaction by parsing a string of the form NAME DATE AMOUNT.
      Transaction​(java.lang.String who, Date when, double amount)
      Initializes a new transaction from the given arguments.

    • 方法概要

      修饰符和类型 方法 说明
      double amount()
      Returns the amount of this transaction.
      int compareTo​(Transaction that)
      Compares two transactions by amount.
      boolean equals​(java.lang.Object other)
      Compares this transaction to the specified object.
      int hashCode()
      Returns a hash code for this transaction.
      static void main​(java.lang.String[] args)
      Unit tests the Transaction data type.
      java.lang.String toString()
      Returns a string representation of this transaction.
      Date when()
      Returns the date of this transaction.
      java.lang.String who()
      Returns the name of the customer involved in this transaction.

      • 从类继承的方法 java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • 构造器详细资料

      • Transaction

        public Transaction​(java.lang.String who,
                   Date when,
                   double amount)
        Initializes a new transaction from the given arguments.
        参数:
        who - the person involved in this transaction
        when - the date of this transaction
        amount - the amount of this transaction
        抛出:
        java.lang.IllegalArgumentException - if amount is Double.NaN, Double.POSITIVE_INFINITY, or Double.NEGATIVE_INFINITY

      • Transaction

        public Transaction​(java.lang.String transaction)
        Initializes a new transaction by parsing a string of the form NAME DATE AMOUNT.
        参数:
        transaction - the string to parse
        抛出:
        java.lang.IllegalArgumentException - if amount is Double.NaN, Double.POSITIVE_INFINITY, or Double.NEGATIVE_INFINITY

    • 方法详细资料

      • who

        public java.lang.String who()
        Returns the name of the customer involved in this transaction.
        返回:
        the name of the customer involved in this transaction

      • when

        public Date when()
        Returns the date of this transaction.
        返回:
        the date of this transaction

      • amount

        public double amount()
        Returns the amount of this transaction.
        返回:
        the amount of this transaction

      • toString

        public java.lang.String toString()
        Returns a string representation of this transaction.
        覆盖:
        toString 在类中 java.lang.Object
        返回:
        a string representation of this transaction

      • compareTo

        public int compareTo​(Transaction that)
        Compares two transactions by amount.
        指定者:
        compareTo 在接口中 java.lang.Comparable<Transaction>
        参数:
        that - the other transaction
        返回:
        { a negative integer, zero, a positive integer}, depending on whether the amount of this transaction is { less than, equal to, or greater than } the amount of that transaction

      • equals

        public boolean equals​(java.lang.Object other)
        Compares this transaction to the specified object.
        覆盖:
        equals 在类中 java.lang.Object
        参数:
        other - the other transaction
        返回:
        true if this transaction is equal to other; false otherwise

      • hashCode

        public int hashCode()
        Returns a hash code for this transaction.
        覆盖:
        hashCode 在类中 java.lang.Object
        返回:
        a hash code for this transaction

      • main

        public static void main​(java.lang.String[] args)
        Unit tests the Transaction data type.
        参数:
        args - the command-line arguments