我有以下使用java.util.Random
的代码,现在我想更改为java.security.SecureRandom
。如何使用SecurRandom执行相同的操作?
int rand = 0;
for (int i = 0; i < 8; i++) {
rand = (int) (Math.random() * 3);
switch (rand) {
case 0:
c = '0' + (int) (Math.random() * 10);
break;
case 1:
c = 'a' + (int) (Math.random() * 26);
break;
case 2:
c = 'A' + (int) (Math.random() * 26);
break;
}
}
答案 0 :(得分:3)
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
int rand = 0;
for (int i = 0; i < 8; i++) {
rand = random.nextInt(3);
switch (rand) {
case 0:
c = '0' + random.nextInt(10);
break;
case 1:
c = 'a' + random.nextInt(26);
break;
case 2:
c = 'A' + random.nextInt(26);
break;
}
答案 1 :(得分:1)
secureRandomObject.nextDouble()
基本上等同于Math.random()
以下代码将起作用......
SecureRandom secureRandom = new SecureRandom();
int rand = 0;
for (int i = 0; i < 8; i++) {
rand = (int) (secureRandom.nextDouble() * 3);
switch (rand) {
case 0:
c = '0' + (int) (secureRandom.nextDouble() * 10);
break;
case 1:
c = 'a' + (int) (secureRandom.nextDouble() * 26);
break;
case 2:
c = 'A' + (int) (secureRandom.nextDouble() * 26);
break;
}
}
答案 2 :(得分:-1)
你希望实现这样的目标:
int rand=0,c=0;;
SecureRandom secrnd=new SecureRandom();
for (int i = 0; i < 8; i++) {
rand = (int) (secrnd.nextInt(10)% 3);
switch (rand) {
case 0:
c = '0' + (int) (secrnd.nextInt(10) % 10);
break;
case 1:
c = 'a' + (int) (secrnd.nextInt(10) % 26);
break;
case 2:
c = 'A' + (int) (secrnd.nextInt(10) % 26);
break;
}
System.out.println(c);
}
请澄清您的问题,以便我能够理解您希望使用上述代码实现的目标。