Java格式行使列排列起来

Question

我试图用Java格式化一行数据，这样每一列都会对齐。我正在使用标签，但它似乎不起作用。

这就是我想要做的：

System.out.printf("Town\tDate\tWind Speed\tDirection\tTemp(F)\tTemp(C)\tWind Chill(C)\tReporter\n");

System.out.printf(town + "\t" + date + "\t" + windSpeed + "\t" + direction + "\t" + 
                            getFahrenheit(tempC) + "\t" + tempC + "\t" + getWindChillFactor(windSpeed, tempC) + "\t" +
                            reporterCode + "\n");

更新：

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Answer 1

您使用的printf方法接受一个格式字符串作为第一个参数，并根据该格式解释参数。在这种情况下，您需要字符串的最小空格数。这可以通过正确的格式字符串来实现，如：

System.out.println("%20s", town);

这将以最小宽度为20个字符的字符串打印城镇。有正确对齐规则，四舍五入浮点等。详情请参阅格式化程序。

Answer 2

在Java 8中尝试这样做，它应该可以工作：

public class test  {
    public static void main(String args[]) {
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","Town","Date","Wind Speed","Direction","Temp(F)","Temp(C)","Wind Chill","Reporter");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","Portland","12/10/15","2.50","W","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","orango","12/10/15","2.50","NW","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","calais","12/10/15","2.50","W","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","calais","12/10/15","2.50","W","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","Portland","12/10/15","2.50","W","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","Portland","12/10/15","2.50","W","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","bangor","12/15/15","2.50","W","36.50","2.50","1.56","PS");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","orango","12/19/15","2.50","NW","36.50","2.50","1.56","PS");

    }
}

要修复更新映像，请执行以下操作：

 System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","Orono","12/15/15","2.50","W","36.50","2.50","1.56","OT");
        System.out.printf("%-12s %-12s%-12s%-12s%-12s%-12s%-12s%s\n","Orono","12/19/15","3.10","NW","36.72","2.90","0.42","SS");

试试上面的代码：