Java中——数据的输入&输出方法

1、数据输入

import java.util.Scanner;

public class ScannerDemo{
	public static void main(String[] args){
		//创建对象,sc为变量名，其余照写
		Scanner sc = new Scanner(System.in);
		//接收数据
        System.out.println("输入整数：i=");
		int i = sc.nextInt();
        System.out.println("输入字符串：s=");
        String s = sc.nextLine();
		//输出数据
        System.out.println("输入的结果：");
		System.out.println("i=" + i);
        System.out.println("s=" + s);
	}
}

2、数据的输出

package myPackage;

public class testString_1 {
    public static void main(String[] args) {
        int i = 1;
        float f = 1.0F;
        double d = 2.0;
        char c = 'a';
        String s = "abc";
        System.out.println("i=" + i);
        System.out.println("f=" + f);
        System.out.println("d=" + d);
        System.out.println("c=" + c);
        System.out.println("s=" + s);
    }
}