將 Java 結果導出到文本文件

Question

你好，我所在的班級，需要將我的代碼（計算聯邦和州稅）的結果導出到文本文件中。 我試過四處瀏覽尋求幫助，但我似乎無法得到它。 請幫忙！

public class FedStateTax {    

public static void main(String[] args) {

    String tn = javax.swing.JOptionPane.showInputDialog("Please enter your name.");
    String fn = javax.swing.JOptionPane.showInputDialog("Enter income value");


        int income = Integer.parseInt(fn);
        double sax = 0;
        double tax = 0;

        if (income <= 50000)
            tax = income * 0.10;
        else if (income <= 100000)
            tax = income * 0.15;
        else if (income <= 150000)
            tax = income * 0.20;

        if (income <= 50000)
            sax = income * 0.05;
        else if (income <= 100000)
            sax = income * 0.10;
        else if (income <= 150000)
            sax = income * 0.15;


        if (income <=  50000)
            System.out.println("Federal tax is: $" + tax);
        else if (income <= 100000)
            System.out.println("Federal tax is: $"+ tax);
        else if (income <= 150000)
            System.out.println("Federal tax is: $"+ tax);

        if (income <=  50000)
            System.out.println("State tax is: $" + sax);
        else if (income <= 100000)
            System.out.println("State tax is: $"+ tax);
        else if (income <= 150000)
            System.out.println("State tax is: $"+ tax);


}
}

Answer 1

據我了解，您想將稅務數據寫入文件。 那你為什么不直接使用：

try {
    Files.write(Paths.get("output.txt"), Arrays.asList("Tas is : " + tax));
} catch (IOException e) {
    e.printStackTrace();
}

Files.write 方法屬於 java.nio 包，它接受Path作為第一個參數和可枚舉字符串作為第二個參數，並將它們逐行寫入文件。

您不應該記得，它會覆蓋現有文件。 如果你只想追加你應該添加第三個參數 StandartOpenOption 如下：

    Files.write(Paths.get("output.txt"), Arrays.asList("Tas is : " + "5", "2"), StandardOpenOption.APPEND);