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我无法显示正确的格式。我已经尝试了一切，这就是我需要代码显示的方式：

  Portfolio #00001, ASD = 42.50, DFAS = 45.00, CAC = 22.20, BDM = 52.50
  Portfolio #00002, ASD = 42.50, DFAS = 45.00, CAC = 22.20, BDM = 52.50
  Portfolio #00001, ASD = 43.35, DFAS = 45.90, CAC = 22.64, BDM = 53.55
  Portfolio #00002, ASD = 43.35, DFAS = 45.90, CAC = 22.64, BDM = 53.55
  Portfolio #00001, ASD = 41.18, DFAS = 43.61, CAC = 21.51, BDM = 50.87
  Portfolio #00002, ASD = 41.18, DFAS = 43.61, CAC = 21.51, BDM = 50.87
  Portfolio #00001, ASD = 43.65, DFAS = 46.22, CAC = 22.80, BDM = 53.92
  Portfolio #00002, ASD = 43.65, DFAS = 46.22, CAC = 22.80, BDM = 53.92

这就是我的代码的显示方式：

Portfolio #00001, ASD = 42.50, 
Portfolio #00001, DFAS = 45.00, 
Portfolio #00001, CAC = 22.20, 
Portfolio #00001, BDM = 52.50, 
Portfolio #00002, ASD = 42.50, 
Portfolio #00002, DFAS = 45.00, 
Portfolio #00002, CAC = 22.20, 
Portfolio #00002, BDM = 52.50,

这是代码：

   public void display() {
    for (Map.Entry<String, Double> entry : priceMap.entrySet()) {
        System.out.printf("\nPortfolio #%s, " + "%s = " + "%.2f, ",
                ticker, entry.getKey(), entry.getValue());
    }
}

请帮忙，为什么他们在第二次进入后会换行。

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2 回答 2

1

好吧，你\n的printf. 但我认为你寻求的逻辑更像是这样。 

public void display(String ticker) {
    System.out.printf("Portfolio #%s", ticker);
    for (Map.Entry<String, Double> entry : priceMap.entrySet()) {
        System.out.printf(", %s = " + "%.2f", entry.getKey(), entry.getValue());
    }
    System.out.println();   // finish up the line.
}
于 2013-10-05T22:25:58.047 回答
0

你printf只有三个参数。您需要为要打印的每个值添加一个参数。

例如，要添加您期望的下一列，请将其更改为：

System.out.printf("\nPortfolio #%s, " + "%s = " + "%.2f, DFAS = %.2f",
            ticker, entry.getKey(), entry.getValue(), getDFASValue());  // <-- You need to specify what the DFAS value is

继续，直到您为所需的每个项目填写了参数。

于 2013-10-05T22:09:45.623 回答