Java中输入与输出的方法总结

import java.util.Scanner; // 导入java.util.Scanner

public class User {
    public static void main(String[] args) {
        var sc = new Scanner(System.in); //生成scanner对象
        System.out.print("请输入你的姓名:");
        String name = sc.nextLine();//输入字符串
        System.out.print("请输入你的年龄:");
        int age = sc.nextInt();//输入整数
        System.out.println("姓名:" + name +"\n" +"年龄:" + age);
    }
}

import java.io.Console;//导入java.io.Console
public class User {
    public static void main(String[] args) {
        Console con = System.console();//建立安全输入
        String name = con.readLine("请输入账号:");
        String passworld = con.readLine("请输入密码:");
        System.out.printf("账号:%s", name);
        System.out.printf("%n密码:%s", passworld);
    }
}

java -Dfile.encoding=UTF-8 User.java

public class User {
    public static void main(String[] args) {
    int a = 1;
    int b = 2;
    System.out.print(a);//print()不换行输出a的值
    System.out.print(b);//print()不换行输出b的值
    }
}

public class User {
    public static void main(String[] args) {
    int a = 1;
    int b = 2;
    System.out.println(a);//println()换行输出a的值
    System.out.println(b);//println()换行输出b的值
    }
}

public class User {
    public static void main(String[] args) {
    int a = 1;
    int b = 2;
    System.out.printf("a=%d%n",a);//printf()格式化输出
    System.out.printf("b=%d",b);//printf()格式化输出
    }
}