Java基础 Scanner 使用nextLine接收字符串

•     JDK ：OpenJDK-11
•      OS ：CentOS 7.6.1810
•      IDE ：Eclipse 2019‑03
• typesetting ：Markdown

 

code

package per.jizuiku.base;

import java.util.Scanner;

/**
 * @author 给最苦
 * @date 2019/06/29
 * @blog www.cnblogs.com/jizuiku
 */
class Demo {

    /**
     * @param args
     */
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        String myStr = sc.nextLine();

        System.out.println("resut:" + myStr);

        sc.close();
    }
}

 

result

hello world
resut:hello world

 

sourceCode

/**
    * Advances this scanner past the current line and returns the input
    * that was skipped.
    *
    * This method returns the rest of the current line, excluding any line
    * separator at the end. The position is set to the beginning of the next
    * line.
    *
    * <p>Since this method continues to search through the input looking
    * for a line separator, it may buffer all of the input searching for
    * the line to skip if no line separators are present.
    *
    * @return the line that was skipped
    * @throws NoSuchElementException if no line was found
    * @throws IllegalStateException if this scanner is closed
    */
public String nextLine() {
    modCount++;
    if (hasNextPattern == linePattern())
        return getCachedResult();
    clearCaches();

    String result = findWithinHorizon(linePattern, 0);
    if (result == null)
        throw new NoSuchElementException("No line found");
    MatchResult mr = this.match();
    String lineSep = mr.group(1);
    if (lineSep != null)
        result = result.substring(0, result.length() - lineSep.length());
    if (result == null)
        throw new NoSuchElementException();
    else
        return result;
}

 

resource

• [ JDK ] openjdk.java.net
• [ doc - 参考 ] docs.oracle.com/en/java/javase/11
• [ 规范 - 推荐 ] yq.aliyun.com/articles/69327
• [ 规范 - 推荐 ] google.github.io/styleguide
• [ 源码 ] hg.openjdk.java.net
• [ OS ] www.centos.org
• [ IDE ] www.eclipse.org/downloads/packages
• [ 平台 ] www.cnblogs.com

 

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感谢帮助过 给最苦 的人们。

Java、Groovy和Scala等基于JVM的语言，优秀，值得学习。

规范的命名和代码格式等，有助于沟通和理解。

JVM的配置、监控与优化，比较实用，值得学习。