Java基础 println print 实现输出换行

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

 

code

package per.jizuiku.base;

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

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

        // 输出后 换行
        System.out.print("hello world");
        System.out.println();
        System.out.print("hello world" + "\n");
        System.out.print("hello world");
        System.out.print(" end");
    }
}

 

result

hello world
hello world
hello world end

 

sourceCode

/**
    * Terminates the current line by writing the line separator string.  The
    * line separator string is defined by the system property
    * {@code line.separator}, and is not necessarily a single newline
    * character ({@code '\n'}).
    */
public void println() {
    newLine();
}

/**
    * Prints a string.  If the argument is {@code null} then the string
    * {@code "null"} is printed.  Otherwise, the string's characters are
    * converted into bytes according to the platform's default character
    * encoding, and these bytes are written in exactly the manner of the
    * {@link #write(int)} method.
    *
    * @param      s   The {@code String} to be printed
    */
public void print(String s) {
    write(String.valueOf(s));
}

 

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。