如何将输出格式化为 Java 中的 table？

Question

我正在尝试制作一份 table 成绩单，应该有 5 列，即 Class、描述、学分、成绩和成绩点。但是，我无法使输出相互对齐。我只是简单地使用“\t”。有没有办法在 Java 中将输出设为 table？

import java.util.*;
public class Project1_Trial2 {
    public static void main(String args[])
    {
        Scanner scanner = new Scanner(System.in);

        //Input the term
        System.out.println("Please enter the term of your grade calculation (for example, Fall 2015): ");
        String term = scanner.nextLine();

        //Input the number of courses that the student is enrolled in
        System.out.println("Please enter the number of courses that you are enrolled in "+term+": ");
        int numberofcourses = scanner.nextInt();

        //Declaration
        String ClassName[] = new String[numberofcourses];
        String Description[] = new String[numberofcourses];
        String Grade[] = new String[numberofcourses];
        int Units[] = new int[numberofcourses];

        //Arrays for class number, description, units, grade, grades point
        //Here, input class number, description, units, and grades
        for(int i = 0; i < numberofcourses; i++)
        {
            scanner.nextLine();
            System.out.println("Please enter your #"+(i+1)+" class name: ");
            ClassName[i] = scanner.nextLine();
            System.out.println("Please enter your #"+(i+1)+" class description: ");
            Description[i] = scanner.nextLine();
            System.out.println("Please enter your #"+(i+1)+" class units: ");
            Units [i] = scanner.nextInt();
            System.out.println("Please enter your #"+(i+1)+" class grade: ");
            Grade[i] = scanner.nextLine();
        }

        System.out.println("Class Grades - "+term+" Term");
        System.out.println("Office Grades");
        System.out.println("Class \t \t Description \t \t Units \t \t Grade \t \t Grade Points");
        for(int i = 0; i < numberofcourses; i++)
        {
        System.out.println(ClassName[i]+"\t \t"+Description[i]+"\t \t"+Units[i]+"\t \t"+Grade[i]);
        }
    }
}

Answer 1

有多种方法可以对齐您的输出，使它们均匀对齐....一种方法是替换您放置的位置：

System.out.println(ClassName[i]+"\t \t"+Description[i]+"\t \t"+Units[i]+"\t \t"+Grade[i]);

与：

System.out.printf("%-15s %-15s %-15s ",ClassName[i],Description[i],String.format("%5d", Units[i]),Grade[i]);

而不是使用 System.out.println() 使用 System.out.printf() 这样你可以填充字符串并在 printf() 函数中使用 String.format() 用空格填充整数......你可以调整我的填充到任何你觉得合适的这是一种比不断使用制表符更有效的方法

如何将输出格式化为 Java 中的 table？

How to format outputs as a table in Java?

java

gpa