(1)
import java.text.io;
DecimalFormat df=new DecimalFormat("#.00");
System.out.println(df.format(d1));
System.out.println(df.format(d2));

public int getRound(double dSource)...{


int iRound


//BigDecimal的构造函数参数类型是double


BigDecimal deSource = new BigDecimal(dSource);


//deSource.setScale(0,BigDecimal.ROUND_HALF_UP) 返回值类型 BigDecimal


//intValue() 方法将BigDecimal转化为int


iRound= deSource.setScale(0,BigDecimal.ROUND_HALF_UP).intValue();


return iRound;


}





(2)



























