读取文本文件中的Java-12

Question

想一想等的文本文件：

line1 ->5 
line2 ->A 10 
line3 ->B 15 
line4 ->C 25 
line5 ->D 5 
line6 ->E 30 

'5' 是{A，B，C，d，E}的数目。

Array1[5] = {A,B,C,D,E} 
Array2[5] = {10,15,25,5,30} 

Answer 1

// read all lines in the file into a list 
List<String> lines = Files.readAllLines(Paths.get("filename"), Charset.defaultCharset()); 

// determine the length of the arrays based on the first line 
int length = Integer.parseInt(lines.remove(0));  

// first column 
String[] col1 = new String[length]; 

// second column 
int [] col2 = new int[length]; 

// now for every remaining row, add to each column 
for(int i = 0; i < length; i++){ 
    String [] pair = lines.remove(0).split(" "); 
    col1[i] = pair[0]; 
    col2[i] = Integer.parseInt(pair[1]); 
} 

或者更简单...

// create a scanner of the file 
Scanner scan = new Scanner(new File("filename")); 

// read the first token as an int to know array length 
int length = scan.nextInt(); 

String [] col1 = new String[length]; 
int [] col2 = new int[length]; 

// assuming valid data, loop through each row 
for(int i = 0; i < length; i++){ 
    col1[i] = scan.next(); 
    col2[i] = scan.nextInt(); 
} 

Answer 2

// x =从您的文件

while(x.hasNext) { 
    String a = x.next(); // This will get the first bit (e.g A, B, C, etc) 
    String b = x.next(); // This will get the last bit (e.g 10, 15, 25, etc) 
    // now just put them in the array 
    // for every extra bit of data you have on a line you just add another String y = x.next(); 
} 

它把他们的阵列将转到下一行后的内容：我怎样才能在两个数组喜欢持有这些变量。 这应该按照你想要的方式读取你的文件。