官术网_书友最值得收藏!

Printing a string

Our goal with this HelloWorld program is pretty modest. When it runs, we'd like it to print some text to this output box at the bottom of our screen.

When we downloaded the Java SDK, we acquired a library of useful functions, one of which will do just this. This is the println(), or print line, function. When our Java code executes over this function, which it will do right away because it's the first function in our main() method's entry point, the Java code will print some words to our output box. Function names are followed by open and close parentheses. Inside these parentheses, we put information that the functions need to complete their task. The println() method, of course, needs to know what we would like it to print. In Java, a line of text is contained by two double quotation marks and we call it a string. Let's have our program print "Hello World!":

主站蜘蛛池模板: 深水埗区| 滨海县| 万源市| 新源县| 蕉岭县| 余姚市| 澎湖县| 福安市| 滦平县| 开江县| 财经| 亚东县| 响水县| 福贡县| 营口市| 万盛区| 留坝县| 绥芬河市| 申扎县| 财经| 运城市| 驻马店市| 商南县| 西吉县| 常州市| 启东市| 竹北市| 聊城市| 淮南市| 嘉鱼县| 桃源县| 丰都县| 石首市| 苏州市| 竹北市| 佛冈县| 临武县| 上杭县| 同德县| 台山市| 诏安县|