java - token “Invalid Character” 出现语法错误，删除此 token

Question

我的 Eclipse 有问题，我使用的是 MAC 操作系统。

我不知道为什么它显示错误:“ token “无效字符”上的语法错误，删除此 token ”。谁能告诉我为什么？我在某处进行了谷歌搜索，但找不到如何解决这个问题。

这是我的代码:

package _Java_tuan1;

import java.util.Scanner;

public class Date {
    private String month;
    private int day, year;

    public Date(){
        month = "January";
        day = 1;
        year = 1000;
    }

    public Date(int monthInt, int day, int year){
        setDate(monthInt, day, year);
    }   

    public Date(String monthString, int day, int year){
        setDate(monthString, day, year);
    }

    public Date(int year){
        setDate(1, 1, year);
    }

    public Date(Date aDate){
        if (aDate == null){
             System.out.println("Fatal Error.");
             System.exit(0);
        }
        month = aDate.month;
        day = aDate.day;
        year = aDate.year;
    }

    public void setDate(int monthInt, int day, int year){
        if(dateOK(monthInt, day, year)){
            this.month = monthString(monthInt);
            this.day = day;
            this.year = year;
        }else{
            System.out.println("Fatal Error");
            System.exit(0);
        }
    }

    public void setDate(String monthString, int day, int year){
        if(dateOK(monthString, day, year)){
            this.month = monthString;
            this.day = day;
            this.year = year;
        }
        else{
            System.out.println("Fatal Error");
            System.exit(0);
        }
    }

    public void setDate(int year){
        setDate(1, 1, year);
    }

    public void setYear(int year){
        if( (year < 1000) || (year > 9999)){
            System.out.println("Fatal Error");
            System.exit(0);
        }
        else{
            this.year = year;
        }
    }

    public void setMonth(int monthNumber){
        if((monthNumber <= 0) || (monthNumber > 12)){
            System.out.println("Fatal Error");
            System.exit(0);
        }
        else{
            month = monthString(monthNumber);
        }
    }

    public void setDay(int day){
        if((day <= 0) || (day > 31)){
            System.out.println("Fatal Error");
            System.exit(0);
        }
        else{
            this.day = day;
        }
    }

    public int getMonth(){
        if(month.equals("January")){
            return 1;
        }
        else if(month.equals("February")){
            return 2;
        }
        else if(month.equals("March")){
            return 3;
        }
        else if(month.equals("April")){
            return 4;
        }
        else if(month.equals("May")){
            return 5;
        }
        else if(month.equals("June")){
            return 6;
        }
        else if(month.equals("July")){
            return 7;
        }
        else if(month.equals("August")){
            return 8;
        }
        else if(month.equals("Septemper")){
            return 9;
        }
        else if(month.equals("October")){
            return 10;
        }
        else if(month.equals("November")){
            return 11;
        }
        else if(month.equals("December")){
            return 12;
        }
        else{
            System.out.println("Fatal Error");
            System.exit(0);
            return 0;
        }
    }

    public int getDay(){
        return day;
    }

    public int getYear(){
        return year;
    }

    public String toString(){
        return (month +" "+day+", "+year);
    }

    public boolean equals(Date otherDate){
        return ((month.equals(otherDate.month)) && (day == otherDate.day) && (year == otherDate.year));
    }

    public boolean precedes(Date otherDay){
        return ( (year < otherDay.year) || (year == otherDay.year) && getMonth() < otherDay.getMonth() ||
                (year == otherDay.year && month.equals(otherDay.month) && day < otherDay.day));
    }

    public void readInput(){
        boolean tryAgain = true;
        Scanner keyboard = new Scanner(System.in);
        while(tryAgain){
            System.out.println("Enter month, day, and year.");
            System.out.println("Do not use a comma.");
            String monthInput = keyboard.next();
            int dayInput = keyboard.nextInt();
            int yearInput = keyboard.nextInt();
            if (dateOK(monthInput, dayInput, yearInput) ){
                setDate(monthInput, dayInput, yearInput);
                tryAgain = false;
            }
            else
                System.out.println("Illegal date. Reenter input.");
        }
    }

    private boolean dateOK(int monthInt, int dayInt, int yearInt){
        return ( (monthInt >= 1) && (monthInt <= 12) && (dayInt >= 1) && (dayInt <= 31) && 
                (yearInt >= 1000) && (yearInt <= 9999) );
    }

    private boolean dateOK(String monthString, int dayInt, int yearInt){
        return (monthOK(monthString) && (dayInt >= 1) && (dayInt <= 31) && (yearInt >= 1000) && (yearInt <= 9999));
    }

    private boolean monthOK(String month){
        return (month.equals("January") 
                || month.equals("February") 
                || month.equals("March") 
                || month.equals("April")
                || month.equals("May")
                || month.equals("May")
                || month.equals("May")
                || month.equals("June")
                || month.equals("July")
                || month.equals("August")
                || month.equals("Septemper")
                || month.equals("Octobor")
                || month.equals("November")
                || month.equals("December"));                                   
    }

    private String monthString(int monthNumber){
        switch(monthNumber){
            case 1: return "January";
            case 2: return "February";
            case 3: return "March";
            case 4: return "April";
            case 5: return "May";
            case 6: return "June";
            case 7: return "July";
            case 8: return "August";
            case 9: return "Septemper";
            case 10: return "October";
            case 11: return "November";
            case 12: return "December";
            default: 
                System.out.println("Fatal Error");
                System.exit(0);
                return "Error";
        }
    }

}

Answer 1

您是否粘贴了 Windows 中的代码？删除最后几个字符并重新输入它们 - 我认为它会消失