java 输入和输出

System.out.println();  //输出且换行
System.out.print();   //输出且不换行
System.out.printf(); // 格式化输出

import java.util.Scanner  //导入包
public class HelloWorld{

    public static void main(String[] args){
        Scanner scanner =new Scanner(System.in);  //创建Scanner类并传入System.in
	    String name = scanner.nextLine();  //读取字符串
        int age = scanner.nextInt();  //读取int
        System.out.printf(name+age);
    }
}