两种方法:
1:import java.util.Scanner;
public class Main{
public static void main(String args[]){
Scanner input=new Scanner(System.in);
float a = input.nextFloat();
String s = String.format("%.3f",a);
System.out.println(s);
}
}
public class Main{
public static void main(String args[]){
Scanner input=new Scanner(System.in);
float a = input.nextFloat();
String s = String.format("%.3f",a);
System.out.println(s);
}
}
2:import java.util.Scanner;
import java.text.DecimalFormat;
public class Main{
public static void main(String args[]){
Scanner input=new Scanner(System.in);
float f = input.nextFloat();
DecimalFormat de = new DecimalFormat("0.000");
String s = de.format(f);
System.out.println(s);
}
}
import java.text.DecimalFormat;
public class Main{
public static void main(String args[]){
Scanner input=new Scanner(System.in);
float f = input.nextFloat();
DecimalFormat de = new DecimalFormat("0.000");
String s = de.format(f);
System.out.println(s);
}
}