import java.util.Random;
public class test {
public static void main(String[] args) {
//测试生成的八位随机数
System.out.println(getRandom(8));
}
public static String getRandom(int length){
String val = "";
Random random = new Random();
//参数length,表示生成几位随机数
for(int i = 0; i < length; i++) {
String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
//输出字母还是数字
if( "char".equalsIgnoreCase(charOrNum) ) {
//输出是大写字母还是小写字母
int temp = random.nextInt(2) % 2 == 0 ? 65 : 97;
val += (char)(random.nextInt(26) + temp);
} else if( "num".equalsIgnoreCase(charOrNum) ) {
val += String.valueOf(random.nextInt(10));
}
}
return val;
}
}
java代码之生成随机数(字符和数字组合)
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转载自1790235360.iteye.com/blog/2372741
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