如何使用Java中的Console类从用户读取数据？
使用控制台类
此类用于从控制台（键盘/屏幕）设备写入/读取数据。它提供了readLine()方法，该方法从键盘读取一行。您可以使用console()方法获取Console类的对象。
注意-如果您尝试在非交互式环境（例如IDE）中执行此程序，则该程序将无法正常工作。
示例
以下Java程序使用Console类从用户读取数据。
import java.io.BufferedReader;
import java.io.Console;
import java.io.IOException;
import java.io.InputStreamReader;
class Student {
String name;
int age;
float percent;
boolean isLocal;
char grade;
Student(String name, int age, float percent, boolean isLocal, char grade) {
this.name = name;
this.age = age;
this.percent = percent;
this.isLocal = isLocal;
this.grade = grade;
}
public void displayDetails() {
System.out.println("Details..............");
System.out.println("Name: "+this.name);
System.out.println("Age: "+this.age);
System.out.println("Percent: "+this.percent);
if(this.isLocal) {
System.out.println("Nationality: Indian");
} else {
System.out.println("Nationality: Foreigner");
}
System.out.println("Grade: "+this.grade);
}
}
public class ReadData {
public static void main(String args[]) throws IOException {
Console console = System.console();
if (console == null) {
System.out.println("Console is not supported");
System.exit(1);
}
System.out.println("Enter your name: ");
String name = console.readLine();
System.out.println("Enter your age: ");
int age = Integer.parseInt(console.readLine());
System.out.println("Enter your percent: ");
float percent = Float.parseFloat(console.readLine());
System.out.println("Are you local (enter true or false): ");
boolean isLocal = Boolean.parseBoolean(console.readLine());
System.out.println("Enter your grade(enter A, or, B or, C or, D): ");
char grade = console.readLine().toCharArray()[0];
Student std = new Student(name, age, percent, isLocal, grade);
std.displayDetails();
}
}输出结果
Enter your name: Krishna Enter your age: 26 Enter your percent: 86 Are you local (enter true or false): true Enter your grade(enter A, or, B or, C or, D): A Details.............. Name: Krishna Age: 26 Percent: 86.0 Nationality: Indian Grade: A