[英]Trouble printing an array using Bluej
我正在嘗試打印一個由整數分隔的行的文件,我想在加載到數組中后打印值,以便可以處理和打印最小值,最大值,均值,中位數等。
這是我的以下代碼,但僅打印2000
:
String txt = UIFileChooser.open();
this.data = new int[2000];
int count = 0;
try {
Scanner scan = new Scanner(new File(txt));
while (scan.hasNextInt() && count<data.length){
this.data[count] = scan.nextInt();
count++;
}
scan.close();
}
catch (IOException e) {UI.println("Error");
}
{UI.printf("Count: %d\n", this.data.length);
}
每次獲得2000作為輸出的原因是,您僅打印出了數組的整個長度,您可以在this.data = new int[2000];
行中將其定義為2000 this.data = new int[2000];
。 要打印出數組中值的數量,最簡單的方法就是使用count
,因為它已經保存了該數量。 要打印出數組中的所有值,只需遍歷數組直到最后一個值,然后打印每個值。 代碼示例如下:
String txt = UIFileChooser.open();
this.data = new int[2000];
int count = 0;
try {
Scanner scan = new Scanner(new File(txt));
while (scan.hasNextInt() && count < data.length){
this.data[count] = scan.nextInt();
count++;
}
scan.close();
}
catch (IOException e) {
UI.println("Error");
}
// this line will print the length of the array,
// which will always be 2000 because of line 2
UI.printf("Count: %d\n", this.data.length);
// this line will print how many values are in the array
UI.printf("Values in array: %d\n", count);
// now to print out all the values in the array
for (int i = 0; i < count; i++) {
UI.printf("Value: %d\n", this.data[i]);
}
// you can use the length of the array to loop as well
// but if count < this.data.length, then everything
// after the final value will be all 0s
for (int i = 0; i < this.data.length; i++) {
UI.printf("Value: %d\n", this.data[i]);
}
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