Question

我添加了System.err.flush（）;和System.out.flush（）;但是问题仍然存在。看来这些printf语句是以随机的非正统顺序输出的。

当（absoluteFinalGrade％1）的范围从0.45到0.49时，我希望输出以红色打印。这是因为由于给了我几百行输出，所以我希望那些重要的行能脱颖而出。但是，system.err.printf似乎以一种非正统的方式干扰了我的输出。可以使用其他方法使我的文字脱颖而出吗？

import java.util.Scanner;

public class FinalChemistryGradeCalculator {
    public static void main (String [] args) {

            Scanner input = new Scanner (System.in);
            Scanner input2 = new Scanner (System.in);

            double termGrade;
            double examinationGrade;
            double examinationMarkScore;
            double examinationMarkTotal;
            double lowestTestGrade;
            double lowestTestMarkScore;
            double lowestTestMarkTotal;
            double initialFinalGrade;
            double absoluteFinalGrade;

            System.out.printf("Input the term grade.%n");
            termGrade = input.nextDouble();
            System.out.printf("%nThe term grade is %.2f.%n", termGrade);

        System.out.printf("%nInput the lowest test mark score.");
        lowestTestMarkScore = input.nextDouble();
        System.out.printf("%nInput the lowest test mark total.");
        lowestTestMarkTotal = input.nextDouble();
        lowestTestGrade = (lowestTestMarkScore/lowestTestMarkTotal) * 100;
        System.out.printf("%nThe lowest test grade is %.2f.%n", lowestTestGrade);

        System.out.printf("%nInput the examination mark total.");   
        examinationMarkTotal = input.nextDouble();

        for (examinationMarkScore = 0; examinationMarkScore <= examinationMarkTotal; examinationMarkScore += 0.5) {
            examinationGrade = (examinationMarkScore/examinationMarkTotal) * 100;
            initialFinalGrade = (termGrade * 0.7) + (examinationGrade * 0.3);
            if (lowestTestGrade < examinationGrade) {
                absoluteFinalGrade = initialFinalGrade - (lowestTestGrade * 0.05) + (examinationGrade * 0.05);
            }
            else {
                absoluteFinalGrade = initialFinalGrade;
            }
            if (absoluteFinalGrade % 1 >= 0.45 && absoluteFinalGrade % 1 <= 0.49) {
                System.err.printf("%n%n--------------------------------------------------------------------------------------------------------------");
                System.err.printf("%nTerm Grade: %.2f ||||| Examination Grade: %.2f (%.1f/%.1f) ||||| Lowest Test Grade: %.2f (%.1f/%.1f)", termGrade, examinationGrade, examinationMarkScore, examinationMarkTotal, lowestTestGrade, lowestTestMarkScore, lowestTestMarkTotal);
                System.err.printf("%nInitial Final Grade: %.2f ||||| Absolute Final Grade: %.2f", initialFinalGrade, absoluteFinalGrade);
                System.err.printf("%n--------------------------------------------------------------------------------------------------------------");
                System.err.flush();
            }
            else {
                System.out.printf("%n%n--------------------------------------------------------------------------------------------------------------");
                System.out.printf("%nTerm Grade: %.2f ||||| Examination Grade: %.2f (%.1f/%.1f) ||||| Lowest Test Grade: %.2f (%.1f/%.1f)", termGrade, examinationGrade, examinationMarkScore, examinationMarkTotal, lowestTestGrade, lowestTestMarkScore, lowestTestMarkTotal);
                System.out.printf("%nInitial Final Grade: %.2f ||||| Absolute Final Grade: %.2f", initialFinalGrade, absoluteFinalGrade);
                System.out.printf("%n--------------------------------------------------------------------------------------------------------------");
                System.out.flush();
            }
        }           
    }
}

Answer 1

您可以使用jansi：

System.out.println( ansi().eraseScreen().render("@|red Hello|@ @|green
 World|@") );

此例子是从引Jansi Github README

请注意，这不会大概从Eclipse或任何IDE包装的工作。

为什么system.err.printf会使我的输出出现故障？

1 个答案: