java如何产生1-8的整数随机数？ java如何产生1-10随机数
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Random r =new Random(100);System.out.println(r.nextInt(8)+1);
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java\u4ee3\u7801\u65b9\u6cd5\u4e00\u5982\u4e0b\uff1a
int random=(int)(Math.random()*10+1)
java\u4ee3\u7801\u65b9\u6cd5\u4e8c\u5982\u4e0b\uff1a
package bdqn_Empy;
import java.util.Random;
public class Text {
/*** @param args*/public static void main(String[] args) {// TODO Auto-generated method stubint a=0;Random b=new Random();a=b.nextInt(101);System.out.println(a);}}
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import java.util.Random;
public class RandomTest {
public static void main(String[] args) {
int max = 8;
int min = 1;
Random random = new Random();
int s = random.nextInt(max)%(max-min+1) + min;
System.out.println(s);
}
}
其中，random.nextInt(max)表示生成[0,max]之间的随机数，然后对(max-min+1)取模。
int result = 1 + (int)(Math.random()*8);//生成随机1到8
int a = 2003+ (int)(Math.random()*7);//生成随机2003到2009
Random r=new Random();
int i=r.nextInt(9);
这样产生的i是从0~~8的整数，你要用的话，判断一下如果产生的是0就不要它
Random r=new Random();
int i=r.nextInt(8)+1;
random.nextInt(结尾数)+起始数
举例说明：
random.nextInt(8)+1：代表生成0到8 以内的数
结果只会在1到8 之间
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绛旓細Math.random();澶т簬鎴栫瓑浜 0.0 浣嗗皬浜 1.0 鐨勪吉闅忔満 double 鍊 濡傛灉鐢鐢熸垚int鍊硷紝鍋囧瑕佺敓鎴100浠ュ唴鐨勫彲浠 (int)(100*Math.random());
绛旓細杩欎釜鏄垜鍐欑殑涓涓浜х敓0-100鐨勯殢鏈烘暟鐨勭▼搴忥紝褰撶劧鏁扮殑鑼冨洿浣犲彲浠ヨ嚜宸卞畾 Math.round(Math.random()*100)锛屽悗闈㈣繖涓100浣犲彲浠ユ敼鎴愪綘鑷繁鎯宠鐨勬暟 import javax.swing.*;import java.awt.event.*;public class RandomUsage extends JFrame implements ActionListener { JButton bt=new JButton("闅忔満鏁"...
绛旓細import java.util.Hashtable;import java.util.Map;import java.util.Random;import java.util.Scanner;public class AddTest { public static void main(String args[]){ boolean flag = true;while(flag){ Scanner scanner = new Scanner(System.in);System.out.println("璇疯緭鍏涓涓1-100鐨勬暣鏁"...
绛旓細閭ｄ箞灏盿<1 && a>0 鎬庢牱鏀瑰彉(0,1)杩欎釜涓滆タ鍛?褰撹繖涓笢瑗夸箻浠ヤ竴涓暟,鎷50涓轰緥鍚,灏变細鍙樻垚(0,50)鐒跺悗浣犲彲浠ュ啀鍔犱笂涓涓暟,鍔犱笂涓涓10鍚,灏变細鍙樻垚(10,60)娉ㄦ剰,杩欎釜鏄竴涓猟ouble鍊 涓嶈兘璧嬬粰int鍨嬬殑 鎵浠ヨ寮哄埗杞崲 (int)(Math.random()*50+10)灏变細杩斿洖涓涓ぇ浜10灏忎簬60鐨勬暣鏁,鍥犱负杩欎釜寮哄埗...
绛旓細import java.util.Arrays;import java.util.Random;import java.util.Scanner;public class TestTest { public static void main(String[] args) { int arr[] = new int[11];Random r=new Random();for(int i=0;i<10;i++){ arr[i]=r.nextInt(100)+1;//寰楀埌10涓100浠ュ唴鐨勬暣鏁 } Arra...
绛旓細{ new Gui("鐚滄暟瀛楁父鎴"); } } class Gui extends Frame implements ActionListener { static int number;static int guessnumber;static TextField tx;static Label lb3,lb1,lb2;static Button bt3,bt1,bt2;Gui(String s){ super(s);lb1=new Label("鍗曞嚮璇ユ寜閽彲浠浜х敓涓涓0-100涔嬮棿鐨勯殢鏈...
绛旓細sc = new java.util.Scanner(System.in); return sc.nextInt(); } public Hello(int a){ //浜х敓闅忔満鏁 int suiJi = new java.util.Random().nextInt(101)+1; switch(max){ case 0: case 1:
绛旓細i < arr.length; i++){ arr[i] = (new java.util.Random().nextInt(1000)+1); } System.out.println(java.util.Arrays.toString(arr)); }catch(Exception e){ System.err.println("杈撳叆鏈夎!"
