how to implement roundup function in java

Question

How to achieve functionality similar to excel's Roundup() in java?

for example - how to round 0.3102 to 0.4 in java ?

Answer 1

double r =0.3102;
BigDecimal bd = new BigDecimal(r);
bd = bd.setScale(1,BigDecimal.ROUND_UP);
r = bd.doubleValue();
System.out.println(r);

Answer 2

BigDecimal can help in achieving this.

for example-

 // new BigDecimal(<your-number>).setScale(<scale-value>, BigDecimal.ROUND_UP)) 
 result =  new BigDecimal(0.3105).setScale(1, BigDecimal.ROUND_UP));

 // result = 0.4