print()打印

int h = 1080;

print(s);

print(w, “x”, h);

// This program writes to the console:

// The size is 1920 x 1080

print(“begin- “);

float f = 0.3;

int i = 1024;

print(“f is ” + f + ” and i is ” + 1024);

String s = ” -end”;

println(s);

// This program writes to the console:

// “begin- f is 0.3 and i is 1024 -end”

Using print() on an object will output null, a memory location that may look like “@10be08,” or the result of the toString() method from the object that’s being printed. Advanced users who want more useful output when calling print() on their own classes can add a toString() method to the class that returns a String.

Note that the console is relatively slow. It works well for occasional messages, but does not support high-speed, real-time output (such as at 60 frames per second). It should also be noted, that a print() within a for loop can sometimes lock up the program, and cause the sketch to freeze.

print () 函数写入控制台区域, 即处理环境底部的黑色矩形。此函数通常有助于查看程序正在生成的数据。辅助函数 println () 像打印 () 一样工作, 但是为每个调用函数创建一个新的文本行。可以通过将多个参数与逗号隔开来传递到函数中。或者, 可以用引号 (“”) 分隔各个元素, 并与加法运算符 (+) 联接。

在对象上使用 print () 将输出 null, 该内存位置可能看起来像 “@10be08”, 或者是从正在打印的对象中生成 tostring () 方法的结果。如果高级用户在自己的类上调用 print () 时需要更有用的输出, 则可以向返回字符串的类中添加 tostring () 方法。

请注意, 控制台相对较慢。它对偶尔的消息很有效, 但不支持高速、real-time 的输出 (如每秒60帧)。还应该注意, for 循环中的打印 () 有时会锁定程序, 并导致草图冻结