What are the methods to enter a character in java

Several methods will be listed below:

Method 1: Receive a character from the console and print it out

public static void main(String [] args) throws IOException{
　　System.out.print(“Enter a Char:”);
　　char i = (char) System.in.read();
　　System.out.println(“your char is :”+i);
　　}
}

Although this method achieves obtaining input characters from the keyboard, System.out.read() can only obtain one character. At the same time, the type of the incoming variable can only be char. , when we input a number and hope to get an integer variable, we have to modify the variable type, which is more troublesome.

Method 2: Receive a string from the console and print it out. In this question, we need to use the BufferedReader class and the InputStreamReader class

public static void main(String [] args) throws IOException{
　　BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
　　String str = null;
　　System.out.println(“Enter your value:”);
　　str = br.readLine();
　　System.out.println(“your value is :”+str);
}　　

so that we can get the string we input.

Method three: I think this method is the simplest and most powerful, which is to use the Scanner class

public static void main(String [] args) {
　　Scanner sc = new Scanner(System.in);
　　System.out.println(“请输入你的姓名：”);
　　String name = sc.nextLine();
　　System.out.println(“请输入你的年龄：”);
　　int age = sc.nextInt();
　　System.out.println(“请输入你的工资：”);
　　float salary = sc.nextFloat();
　　System.out.println(“你的信息如下：”);
　　System.out.println(“姓名：”+name+“\n”+“年龄：”+age+“\n”+“工资：”+salary);
}

This code has shown that Scanner Whether the class is for strings, integer data or float type variables, you only need to make a small change to achieve the function! Undoubtedly it is the most powerful!

Recommended tutorial: java introductory tutorial

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