Question

用java编写一个程序，接受用户输入的一个浮点数，把它的整数部分和小数部分分别输出

import java.in.*
public.........
System out.println("请输入数字");
try.......
float.....=....
......
catch....
大概就是这样，呃。感激不尽

Answer 1

package floatandint;

import java.util.Scanner;

public class FloatAndInt {
public static void main(String[] args){
float f = 0f;
Scanner sc = new Scanner(System.in);
System.out.println("请输入浮点型数字：");
try{
f = sc.nextFloat();
System.out.println("整数部分：" + (int)f);
System.out.println("小数部分：" + getXiaoshu(f));
}catch(Exception e){
e.printStackTrace();
}
}

private static String getXiaoshu(float f) {
return (f + "") .substring(1+ ((f + "").indexOf("."))) ;
}
}

Answer 2

float f = 1.1212f;

String sf = String.valueOf(f);

System.out.println(sf.substring(0, sf.indexOf('.')));
System.out.println(sf.substring(sf.indexOf('.')+1, sf.length()));