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Legal Studies在 Java 中使用 Console 类从键盘读取数据
Console 类用于向控制台（键盘/屏幕）设备写入/读取数据。它提供了一个 readLine() 方法，用于从键盘读取一行。你可以使用 console() 方法获取 Console 类的对象。
注意 − 如果尝试在非交互式环境（如 IDE）中执行此程序，则该程序无法工作。
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
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
更新时间：15-Oct-2019
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