//TreeSet
TreeSet<Integer> set = new TreeSet<>();
int n = in.nextInt();
for(int i=0; i<n; i++){
set.add(in.nextInt());
}
for(Integer a : set){
System.out.println(a);
}
/*
https://blog.csdn.net/Cricket_7/article/details/94430056 倒序
*/
//大数
String a = in.next();
String b = in.next();
BigInteger m = new BigInteger(a);
BigInteger n = new BigInteger(b);
m = m.add(n);
System.out.println(m.toString());
//String转char
char[] a = s.toCharArray();
//char转String
s2[i] = String.valueOf(a);
String q2 = new String(a);
//String转int
tp1 = Integer.parseInt(a);
//保留小数输出格式
double ans
System.out.println(String.format("%.3f",ans));
//split
for(String a:x.split("/"))
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/tech/java/280684.html