// 这样就行了.public class Test { public static void main(String args[]) { int a = 10; int b = 4; float c; c = (float)b / a; System.out.println(String.valueOf(c)); } }
0.4 float c = 0.00F;
建议用java.math.BigDecimalBigDecimal a = new BigDecimal("0.2"); a = a.setScale(4); System.out.println(a);使用方法请看java API
public static void main(String args[]) {
int a = 10;
int b = 4;
float c;
c = (float)b / a;
System.out.println(String.valueOf(c));
}
}
float c = 0.00F;
a = a.setScale(4);
System.out.println(a);使用方法请看java API
具体建议看下EFFECTIVE JAVA