Java provides a Scanner class. Using this class, we can easily obtain keyboard input parameters.
Scanner is a text scanner based on regular expressions. Values ??of basic types and string types can be parsed from files, input streams, and strings. The Scanner class provides multiple constructors. Different constructors can accept files, input streams, and strings as data sources and are used to parse data from files and input stream strings.
Example:
import java.util.Scanner;
/**
* Scanner的簡(jiǎn)單示例
* */
public class TestScanner {
public static void main(String[] args) {
//創(chuàng)建Scanner對(duì)象
//System.in表示標(biāo)準(zhǔn)化輸出，也就是鍵盤輸出
Scanner sc = new Scanner(System.in);
//利用hasNextXXX()判斷是否還有下一輸入項(xiàng)
while (sc.hasNext()) {
//利用nextXXX()方法輸出內(nèi)容
String str = sc.next();
System.out.println(str);
}
}
}The result is: after you enter something in the console and click Enter, the same content will be output below. If you click Return when entering If you press the Enter or Tab key, the output content will wrap at that location.
You can use Scanner to enter parameters when the java program requires parameters
Code example: TestScannerIn.java
import java.util.Scanner;
/**
* 使用Scanner在程序需要的時(shí)候輸入?yún)?shù)
* */
public class TestScannerIn {
public static void main(String[] args) {
/**
* 寫一個(gè)輸出個(gè)人信息的小例子
* */
Scanner sc = new Scanner(System.in);
sc.useDelimiter("/n");
System.out.println("歡迎來(lái)到?jīng)_出地球的博客，我是沖出地球^_^");
System.out.println("請(qǐng)問(wèn)你叫什么名字呢？");
String name = sc.nextLine();
System.out.println("請(qǐng)問(wèn)你來(lái)自哪里呢？");
String area = sc.nextLine();
System.out.println("好的，你來(lái)自" + area + ",那么，你們那有什么美食嗎？");
String food = sc.nextLine();
System.out.println("好的，那么我來(lái)復(fù)述一下你的信息：");
System.out.println("你叫" + name + ",來(lái)自于：" + area);
System.out.println("你們那最好吃的東西是：" + food);
System.out.println("對(duì)吧~~");
}
}For more java knowledge, please pay attention tojava basic tutorial.
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