我正在尝试制作一种小方法,允许用户将犯罪行为输入“犯罪数据库”,并且仅显示实施该犯罪的罪犯。

不幸的是,我必须使用2D阵列。我已经写了一个方法,但是它没有给我想要的输出。

方法如下:

    //method to search data
public static void searchData() throws IOException{

    int flag = 0;
    boolean found = false;

//input search key
    System.out.print("Which crime would you like to select? (arson, theft, assault) ");
    String searchKey = br.readLine();

    System.out.println("You searched for criminals with the offence of \"" + searchKey + "\".");
    System.out.println("Name - Crime - Year of Conviction");

    for(int i = 0; i < criminals.length; i++){
        if(searchKey.compareTo(criminals[i][1]) == 0){
            flag = i;
            found = true;
        }
    }

    if(found == false){
        System.out.println("Error! Crime not found.");
    }else{
        System.out.println("Criminals found.");
        for(int i = 0; i < criminals.length; i++){
            System.out.println(criminals[flag][0] + " - " + criminals[flag][1] + " - " + criminals[flag][2]);
        }
    }
}


我的输入是这样的:

George - theft - 1999
Eddie - assault - 2003
Al - theft - 1999


这是测试后的输出:

Which crime would you like to select? (arson, theft, assault) theft
You searched for criminals with the offence of "theft".
Criminals found.
Al - theft - 1999
Al - theft - 1999
Al - theft - 1999


您能帮我弄清楚这是怎么回事吗?提前致谢。 :)

最佳答案

您一直在打印最后发现的犯罪分子(标志)。

for(int i = 0; i < criminals.length; i++){
    if(searchKey.compareTo(criminals[i][1]) == 0){
        if(!found) {
            found = true;
            System.out.println("Criminals found.");
        }
        System.out.println(criminals[i][0] + " - " + criminals[i][1] + " - " + criminals[i][2]);
    }
}

if(found == false){
    System.out.println("Error! Crime not found.");
}

07-28 14:07