Java 使用单个扫描仪对象扫描多行
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Scanning multiple lines using single scanner object
提问by Creative_Cimmons
I a newbie to java so please don't rate down if this sounds absolute dumb to you
我是java的新手，所以如果这对你来说听起来绝对愚蠢，请不要评价
ok how do I enter this using a single scanner object
好的，我如何使用单个扫描仪对象输入此内容
5
hello how do you do
welcome to my world
6 7
5
你好，你怎么样
欢迎来到我的世界
6 7
for those of you who suggest
对于那些建议的人
scannerobj.nextInt->nextLine->nextLine->nextInt->nextInt,,,
check it out, it does not work!!!
看看，没用！！！
thanks
谢谢
采纳答案by ifloop
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.printf("Please specify how many lines you want to enter: ");
String[] input = new String[in.nextInt()];
in.nextLine(); //consuming the <enter> from input above
for (int i = 0; i < input.length; i++) {
input[i] = in.nextLine();
}
System.out.printf("\nYour input:\n");
for (String s : input) {
System.out.println(s);
}
}
Sample execution:
示例执行：
Please specify how many lines you want to enter: 3
Line1
Line2
Line3
Your input:
Line1
Line2
Line3
回答by Jay kumar
try this code
试试这个代码
Scanner in = new Scanner(System.in);
System.out.printf("xxxxxxxxxxxxxxx ");
String[] input = new String[in.nextInt()];
for (int i = 0; i < input.length; i++) {
input[i] = in.nextLine();
}
for (String s : input) {
System.out.println(s);
}
回答by Raghuveer Reddy
public class Sol{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(sc.hasNextLine()){
System.out.println(sc.nextLine());
}
}
}
回答by Jouberto Fonseca
You can try only with lambda too:
您也可以仅使用 lambda 尝试：
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
scanner.forEachRemaining(input -> System.out.println(input));
}
回答by Sudarshan
may be we can use this approach:
也许我们可以使用这种方法：
for(int i = 0; i < n; i++)
{
Scanner sc1 = new Scanner(System.in);
str0[i] = sc1.nextLine();
System.out.println(str0[i]);
}
that is we create the scanner object every time before we read the nextLine. :)
也就是说，我们每次在读取 nextLine 之前都会创建扫描仪对象。:)
回答by chirr
By default, the scanner uses space as a delimiter. In order to scan by lines using forEachRemaining, change the scanner delimiter to line as below.
默认情况下，扫描仪使用空格作为分隔符。要使用 forEachRemaining 按行扫描，请将扫描仪分隔符更改为 line，如下所示。
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
scanner.useDelimiter("\n");
scanner.forEachRemaining(System.out::println);
}
