lines()方法是静态方法,它返回从给定的multi-line字符串中提取的行流,以行终止符分隔,如下所示:行终止符 命令 换行符 \ n 回车符 \ r 回车后立即换行 \ r \ n
用法:
public Stream<String> lines()
返回类型:字符串流按multi-line中的顺序显示
示例:
Input : "Geek \n For \n Geeks \n 2021" Output: Geek For Geeks 2021
实现方式:
在这里,我们将讨论三个示例,以更好地理解具有数据结构的String类lines()方法的用法。
- forEach
- 将行转换为ArrayList
- 将行转换为数组
让我们一一讨论:
范例1:每次
Java
// Importing Stream class from
// java.util package
import java.util.stream.Stream;
// Class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Custom input string
String str
= " Geeks \n For \n Geeks \r Technical \r\n content \r writer \n Internship";
// Generating stream of lines from string
// using line method
Stream<String> lines = str.lines();
// print and display the output string
// using forEach aand scope resolution operator
lines.forEach(System.out::println);
}
}
输出
Geeks For Geeks Technical content writer Internship
范例2:使用forEach到ArrayList的行流
Java
// Java Program to illustrate String class lines() method
// by converting stream of lines to ArrayList
// Importing ArrayList and Stream class
// from java.util package
import java.util.ArrayList;
import java.util.stream.Stream;
// Class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Custom input string
String str
= " Geeks \n For \n Geeks \r Technical \r\n content \r writer \n Internship";
// Generating stream of lines from string
// using lines() method
Stream<String> lines = str.lines();
// Creating an ArrayList object of String type
ArrayList<String> arrayList = new ArrayList<>();
// Now, adding elements to arrayList using forEach
lines.forEach(arrayList::add);
// Print and display the ArrayList
System.out.println(arrayList);
}
}
输出
[ Geeks , For , Geeks , Technical , content , writer , Internship]
范例3:排列的线流
Java
// Java Program to illustrate String class lines() method
// by converting stream of lines to array
// Importing Arrays and Stream class from
// java.util package
import java.util.Arrays;
import java.util.stream.Stream;
// Class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Custom input string
String str
= " Geeks \n For \n Geeks \r Technical \r\n content \r writer \n Internship";
// Generating stream of lines from
// string using line() method
Stream<String> lines = str.lines();
// Converting into array
// using toArray() method
Object[] array = lines.toArray();
// Print and display the array
// using standard toString() method
System.out.println(Arrays.toString(array));
}
}
输出
[ Geeks , For , Geeks , Technical , content , writer , Internship]
相关用法
注:本文由纯净天空筛选整理自le0大神的英文原创作品 Java String Class lines() Method with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。