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")

}

}

}