1 System.out.println(Math.round(-12.7));
//输出-13
2 System.out.println(Math.round(-12.5));
//输出-12
3 System.out.println(Math.round(-12.4));
//输出-12
4 System.out.println(Math.round(12.5));
//输出13
5 System.out.println(Math.round(12.4));
//输出12
6
7 System.out.println("------------"
);
8
9 System.out.println(Math.ceil(1.5));
//输出2.0
10 System.out.println(Math.ceil(1.4));
//输出2.0
11 System.out.println(Math.ceil(-1.5));
//输出-1.0
12 System.out.println(Math.ceil(-1.6));
//输出-1.0
13 System.out.println(Math.ceil(-1.4));
//输出-1.0
14
15 System.out.println("------------"
);
16
17 System.out.println(Math.floor(1.5));
//输出1.0
18 System.out.println(Math.floor(1.4));
//输出1.0
19 System.out.println(Math.floor(-1.6));
//输出-2.0
20 System.out.println(Math.floor(-1.5));
//输出-2.0
21 System.out.println(Math.floor(-1.4));
//输出-2.0
转载于:https://www.cnblogs.com/lhh666/p/11583922.html
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