關(guān)于java中 隨機(jī)產(chǎn)生的問題 這段代碼中int random = (int)(Math.random()*10); 為什么要 *10
import java.util.*;
/**
* GuessMachine.java
*
*/
public class GuessMachine {
String name ;
double price;
/**
* 初始化商品信息
*/
public void initial(){
int random = (int)(Math.random()*10); //產(chǎn)生隨機(jī)數(shù)
switch(random){
case 0:
case 1:
case 2:
case 3:
name = "公主電動(dòng)車";
price = 2000;
break;
case 4:
case 5:
case 6:
name = "34寸純平彩電";
price = 3000;
break;
case 7:
case 8:
case 9:
name = "新飛冰箱";
price = 3400;
break;
default:
break;
}
}