使用扫描仪选择特定文本

Question

我试图使用扫描仪和分隔符获取某些文本，但我一直失败。

文件中的样本：

CROSSPLANE_AXIS=X DEPTH_AXIS=Depth INPLANE_AXIS_DIR=GUN_TARGET CROSSPLANE_AXIS_DIR=LEFT_RIGHT DEPTH_AXIS_DIR=UP_DOWN ENERGY=6.00 NOMINAL_DMAX=13.00 SSD=1000.00 SCD=450.00 BLOCK=0 WEDGE=App25x25

public static Double energy;
for (int i = 0; i < lengthOfFiles; i++) {
                Scanner readAndStore = new Scanner(content);
                int j = 0;

                while (readAndStore.hasNextLine()) {

                     if (readAndStore.hasNext("ENERGY=")) {
                        readAndStore.useDelimiter("=");
                        energy = readAndStore.nextDouble();
                        }

Answer 1

因为您的所有行都是相同的格式，所以更容易

 // read all lines
 while (readAndStore.hasNextLine()) {

     String line = readAndStore.readLine ();


     // split using =
     String [] words = line.split ("=");     // assuming you are going to parse all lines

     if (words[0].equals ("ENERGY")) {
         energy = Double.parseDouble (words[1]);
     }