为何打印“B”比打印“＃”要慢得多？ - Why is printing “B” dramatically slower than printing “#”?

问题：

I generated two matrices of 1000 x 1000 : 我生成了两个1000 x 1000矩阵：

First Matrix: O and # . 第一个矩阵： O和# 。
Second Matrix: O and B . 第二个矩阵： O和B

Using the following code, the first matrix took 8.52 seconds to complete: 使用如下代码，第一个矩阵须要8.52秒才能完成：

Random r = new Random();
for (int i = 0; i < 1000; i++) {
    for (int j = 0; j < 1000; j++) {
        if(r.nextInt(4) == 0) {
            System.out.print("O");
        } else {
            System.out.print("#");
        }
    }

   System.out.println("");
 }

With this code, the second matrix took 259.152 seconds to complete: 使用此代码，第二个矩阵须要259.152秒才能完成：

Random r = new Random();
for (int i = 0; i < 1000; i++) {
    for (int j = 0; j < 1000; j++) {
        if(r.nextInt(4) == 0) {
            System.out.print("O");
        } else {
            System.out.print("B"); //only line changed
        }
    }

    System.out.println("");
}

What is the reason behind the dramatically different run times? 运行时间大不相同的缘由是什么？

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As suggested in the comments, printing only System.out.print("#"); 正如评论中所建议的那样，只打印System.out.print("#"); takes 7.8871 seconds, whereas System.out.print("B"); 须要7.8871秒，而System.out.print("B"); gives still printing... . still printing...

As others who pointed out that it works for them normally, I tried Ideone.com for instance, and both pieces of code execute at the same speed. 正如其余人指出它一般适用于他们同样，我尝试过Ideone.com ，两段代码都以相同的速度执行。

Test Conditions: 测试条件：

• I ran this test from Netbeans 7.2 , with the output into its console 我从Netbeans 7.2运行了这个测试，输出到它的控制台
• I used System.nanoTime() for measurements 我使用System.nanoTime()进行测量

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解决方案：

参考一： https://stackoom.com/question/1U5XA/为何打印-B-比打印-要慢得多
参考二： https://oldbug.net/q/1U5XA/Why-is-printing-B-dramatically-slower-than-printing