Question

import java.io.File;
import java.util.Scanner;

public class scoresedit {

public static void main(String[] args) throws Exception{
    System.out.println("Reads in a file at the beginning of a loop, displays these top 3 scores by name and their respective score." +
        "\nEnter a new name and score following a prompt. " +
        "\nIf the new name and score exceeds one of the top three scores," +
        "\nplaces the new name in the top three, moving all lower scores down, dropping the lowest score." +
        "\nSaves the results in the file top3Scores.txt."  +
        "\nStops the loop when exit is entered for a name.");
    File r = new File ("top3Scores.txt");
    System.out.println(r);
    String str = readSource (r);
    System.out.println(str);
    String[] strArray = new String[] {str};
    Scanner in = new Scanner(System.in);
    System.out.print("Enter a new name and score or 'exit' to quit:");
    String nameAndScore = in.nextLine();
    String[] nameAndScoreArray = new String[] {nameAndScore};
    String nameAndScoreArray1[] =  nameAndScore.split(" ");
    while (nameAndScore != "exit") {
        if (nameAndScoreArray[1] > strArray[1]) }
    }

private static String readSource(File r) throws Exception{
    Scanner in;
    in = new Scanner (r);
    String str = "";
    while (in.hasNext())
        str += in.nextLine() +"\n";
    in.close();
    return str;
}

}

我一直收到错误“运算符＆gt;未定义参数类型java.lang.String，java.lang.String”当我尝试比较两个数组而我不知道如何修理它。代码没有完成;很明显我在if语句下添加了更多，但我想先解决这个问题。

Answer 1

您正在尝试比较nameAndScoreArray[1]和strArray[1]哪些是字符串，我假设它们包含两个团队的分数，而得分最高的一个获胜，因此您希望使用{{1} }以便查看哪一个得分最高：

Integer.parseInt(String string)

Answer 2

您无法将String与运算符<，>进行比较，而是需要使用compareTo。

比较java中的数组？

2 个答案: