float类型的变量,如何保留两位小数?

[studyhardlr]

public class ArrayCompute
{

float array[];

ArrayCompute(){

float arrTemp[] = {60f,78.8f,92f,87f,58.4f,66f,73f,97f,79f,96f};
this.array = arrTemp;
};


float aSum(int arrLength){ //arrLength数组长度,求学员总成绩

float sum = 0.0f;

for (int i=0;i<arrLength;i++){
sum+=this.array[i];};

return sum;
};


float aAvg(int arrLenth,float sum){ //arrLength数组长度,求学员平均成绩

float avg = 0.0f;

avg = sum / arrLenth;
return avg;
};



public static void main(String arg[])
{
int aLenth = 0; //数组长度
float aSum = 0.0f; //学员总成绩

ArrayCompute ArrCom = new ArrayCompute();
aLenth = ArrCom.array.length;
aSum = ArrCom.aSum(aLenth);
System.out.println("学员成绩总和: "+ aSum);
System.out.println("学员平均成绩: "+ ArrCom.aAvg(aLenth,aSum));

}

}

问题:
float aSum(int arrLength){ //arrLength数组长度,求学员总成绩

float sum = 0.0f;

for (int i=0;i<arrLength;i++){
sum+=this.array[i];};

return sum;
};

这个返回值 sum 如何让返回保留两位小数的值?

[lianhg]

DecimalFormat formater=new DecimalFormat("#0.##");
System.out.println(formater.format(f));

[ly342540479]

format()函数就OK了

[cocogg]

听说JDK1.5能！