java 基础 Java源程序如何变成Java字节码?
Java源程序如何变成Java字节码?编译器默认都会将java文件变成字节码,让电脑看的懂手动的话就用cmd javac xxxx.java 编译java如何生成12位序列号?private stat
Java源程序如何变成Java字节码?
编译器默认都会将java文件变成字节码,让电脑看的懂手动的话就用cmd javac xxxx.java 编译
java如何生成12位序列号?
private static int maxvaluefive=99999999
private static int minvaluefive=0
private static AtomicInteger atomic = new AtomicInteger(minvaluefive)
/** 生成序列号 */
static String getSeqFive(int coverPad) {
for () {
int current = atomic.get()
int newValue = current >= maxvaluefive ? minvaluefive : current 1
if (atomic.compareAndSet(current, newValue)) {
return StringUtils.leftPad(String.valueOf(current), coverPad, "0")
}
}
}