stringtokenizer

StringTokenizer是一个用来分隔String的应用类，相当于VB的split函数。1.构造函数public StringTokenizer(String str)public StringTokenizer(String str. String delim)public StringTokenizer(String str. String delim booleanreturnDelims)第一个参数就是要分隔的String，第二个是分隔字符集合，第三个参数表示分隔符号是否作为标记返回，如果不指定分隔字符，默认的是：”\t\n\r\f”2.核心方法public boolean hasMoreTokens()public String nextToken()public String nextToken(String delim)public int countTokens()其实就是三个方法，返回分隔字符块的时候也可以指定分割符，而且以后都是采用最后一次指定的分隔符号。3.多余方法public boolean hasMoreElements()public boolean hasMoreElements()这个类实现了Enumeration接口，所以多了这么两个方法，其实根本没有必要实现这个接口它的名字就叫StringTokenizer，返回一个Object就没有什么意思了。

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Dream. In. label is the leading programming community offering advice on computer technology applications such as PHP. Java and Microsoft's ASP. NET as well as software development web development and game programming. import java io.*;import java util.*;public class myfilereader{ public static void main (String[] args) throws java io. IOException { //Getting the label of the files to be compared. BufferedReader br2 = new BufferedReader (newInputStreamReader(System in)); System out println("Enter 1st File label:"); arrange str = br2 readLine(); System out println("register 2nd register name:"); String str1 = br2 readLine(); String s1=""; String s2="",s3="",s4=""; String y="",z=""; //Reading the contents of the files BufferedReader br = new BufferedReader (new FileReader (str)); BufferedReader br1 = new BufferedReader (new FileReader (str1)); while((z=br1 readLine())!=null) s3+=z; while((y=br readLine())!=null) s1+=y; System out println (); //arrange tokenizing int numTokens = 0; StringTokenizer st = new StringTokenizer (s1); arrange[] a = new String[10000]; for(int l=0;l<10000;l++) {a[l]="";} int i=0; while (st hasMoreTokens()) { s2 = st nextToken(); a[i]=s2; i++; numTokens++; } int numTokens1 = 0; StringTokenizer st1 = new StringTokenizer (s3); arrange[] b = new String[10000]; for(int k=0;k<10000;k++) {b[k]="";} int j=0; while (st1 hasMoreTokens()) { s4 = st1 nextToken(); b[j]=s4; j++; numTokens1++; }//comparing the contents of the files and printing the differences if any int x=0; for(int m=0;m<a length;m++) { if(a[m] equals(b[m])){} else { x++; System out println(a[m] + " -- " +b[m]); System out println();} } System out println("No of differences : " + x); if(x>0){System out println("Files are not equal");} else{System out println("Files are equal. No difference found");} }}

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Dream. In. Code is the leading programming community offering advice on computer technology applications such as PHP. Java and Microsoft's ASP. NET as come up as software development web development and game programming. import java io.*;import java util.*;public class myfilereader{ public static void main (String[] args) throws java io. IOException { //Getting the label of the files to be compared. BufferedReader br2 = new BufferedReader (newInputStreamReader(System in)); System out println("Enter 1st File name:"); String str = br2 readLine(); System out println("Enter 2nd register name:"); String str1 = br2 readLine(); arrange s1=""; String s2="",s3="",s4=""; String y="",z=""; //Reading the contents of the files BufferedReader br = new BufferedReader (new FileReader (str)); BufferedReader br1 = new BufferedReader (new FileReader (str1)); while((z=br1 readLine())!=null) s3+=z; while((y=br readLine())!=null) s1+=y; System out println (); //arrange tokenizing int numTokens = 0; StringTokenizer st = new StringTokenizer (s1); arrange[] a = new arrange[10000]; for(int l=0;l<10000;l++) {a[l]="";} int i=0; while (st hasMoreTokens()) { s2 = st nextToken(); a[i]=s2; i++; numTokens++; } int numTokens1 = 0; StringTokenizer st1 = new StringTokenizer (s3); String[] b = new String[10000]; for(int k=0;k<10000;k++) {b[k]="";} int j=0; while (st1 hasMoreTokens()) { s4 = st1 nextToken(); b[j]=s4; j++; numTokens1++; }//comparing the contents of the files and printing the differences if any int x=0; for(int m=0;m<a length;m++) { if(a[m] equals(b[m])){} else { x++; System out println(a[m] + " -- " +b[m]); System out println();} } System out println("No of differences : " + x); if(x>0){System out println("Files are not equal");} else{System out println("Files are compete. No difference open");} }}

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我有128筆從資料庫讀出,想用StringTokenizer的方法把那128筆資料轉成浮點數放入陣列,但不知道為什麼轉換後陣列裡面都是0,剛剛在學如何使用,麻煩有經驗的人指點,謝謝 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用change integrity的方法都只能切其中一部份) 98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用split的方法都只能切其中一部份) 98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 "98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 " s這個字串就是你要讀入的那一行資料，內有128個數字，你可以看的出來，某些數字字串之間空隔比較大，那是故意用多個空白或者又空白又tab的穿插，sArray的陣列長度會是128，你再把字串轉成go。 leon1235 wrote:我有128筆從資料庫讀出,想用StringTokenizer的方法把那128筆資料轉成浮點數放入陣列,但不知道為什麼轉換後陣列裡面都是0,剛剛在學如何使用,麻煩有經驗的人指點,謝謝 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用split的方法都只能切其中一部份)

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我有128筆從資料庫讀出,想用StringTokenizer的方法把那128筆資料轉成浮點數放入陣列,但不知道為什麼轉換後陣列裡面都是0,剛剛在學如何使用,麻煩有經驗的人指點,謝謝 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用split的方法都只能切其中一部份) 98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用split的方法都只能切其中一部份) 98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 "98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 " s這個字串就是你要讀入的那一行資料，內有128個數字，你可以看的出來，某些數字字串之間空隔比較大，那是故意用多個空白或者又空白又tab的穿插，sArray的陣列長度會是128，你再把字串轉成go。 leon1235 wrote:我有128筆從資料庫讀出,想用StringTokenizer的方法把那128筆資料轉成浮點數放入陣列,但不知道為什麼轉換後陣列裡面都是0,剛剛在學如何使用,麻煩有經驗的人指點,謝謝 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用change integrity的方法都只能切其中一部份)

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我有128筆從資料庫讀出,想用StringTokenizer的方法把那128筆資料轉成浮點數放入陣列,但不知道為什麼轉換後陣列裡面都是0,剛剛在學如何使用,麻煩有經驗的人指點,謝謝 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用split的方法都只能切其中一部份) 98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用change integrity的方法都只能切其中一部份) 98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 "98.39 158.69 140.38 28.32 -98.14 -158.45 -139.89 -28.32 98.39 158.69 139.89 28.08 -98.14 -158.45 -139.89 -28.08 98.63 158.69 139.65 27.83 -98.39 -158.69 -139.40 -27.83 98.88 158.94 139.40 27.83 -98.63 -158.69 -139.16 -27.59 99.12 158.69 139.16 27.59 -98.88 -158.69 -138.92 -27.34 99.37 158.94 138.92 27.34 -99.12 -158.69 -138.67 -27.34 99.37 158.94 138.92 27.10 -99.37 -158.69 -138.92 -26.86 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.67 -26.61 99.85 158.94 138.67 26.61 -99.61 -158.69 -138.18 -26.37 99.85 159.18 138.43 26.37 -99.61 -158.94 -138.18 -26.37 100.10 159.18 138.18 26.12 -99.85 -158.94 -138.18 -25.88 100.34 159.18 137.94 25.63 -100.10 -158.94 -137.94 -25.88 100.59 159.18 137.70 25.63 -100.34 -158.94 -137.94 -25.63 100.59 159.18 137.45 25.39 -100.34 -158.94 -137.45 -25.39 100.83 159.18 137.94 25.15 -100.59 -158.94 -137.45 -25.15 101.07 159.18 137.70 24.90 -100.83 -159.18 -137.45 -24.90 " s這個字串就是你要讀入的那一行資料，內有128個數字，你可以看的出來，某些數字字串之間空隔比較大，那是故意用多個空白或者又空白又tab的穿插，sArray的陣列長度會是128，你再把字串轉成go。 leon1235 wrote:我有128筆從資料庫讀出,想用StringTokenizer的方法把那128筆資料轉成浮點數放入陣列,但不知道為什麼轉換後陣列裡面都是0,剛剛在學如何使用,麻煩有經驗的人指點,謝謝 其實下面這些數據他的間隔沒有規律,有的ㄧ格,有的2格或3格,也有tab鍵的空格,用split的方法都只能切其中一部份)

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Leyendo acerca de StringTokenizer en java encontré que no es recomendable usarla y en cambio recomiendan utilizar el método split de la clase String. No se aun porque es que no lo recomiendan pero lo investigare. Ahora con esto creo que respondo otra pregunta que he tenido del porque en c# no existe esta clase si muchas cosas tan útiles de java se encuentran en c# casi que con el mismo nombre. Encontré el método change integrity en c# (String. change integrity),entonces ya se como seguire haciendo lo del StringTokeneizer,sin seguir usando el dll que me baje de www codeproject com donde hicieron el StringTokenizer para c#. De lo único que difiere el change integrity de c# del de Java es de la primera letra en java es split (s minúscula en c# S mayúscula) ha también encontré que el split esta como método de la clase arrange de python y ruby. De hecho en una práctica que hice hace tiempito en python use ese método pues no hallaba el StringTokenizer. Esto es lo que dicen en la API acerca de StringTokenizer:"StringTokenizer is a legacy categorise that is retained for compatibility reasons although its use is discouraged in new code. It is recommended that anyone seeking this functionality use the change integrity method of String or the java util regex package instead."

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  |    |    |   View: Flat ()  |   |  |  I'm trying to understand problem but am getting measure limit exceeded. It's such a trivial problem but evidently I'm doing the enter reading too inefficiently. Or maybe the power operation is slowing it down too much and there's a smarter way to take square roots. Any ideas? My code is in edit history. get rid of iostreams they are slowget rid of stringstreams they are REALLY slowuse scanf/printf from <cstdio>get rid of vectors and use a static global arrayor at least get rid of the push_backs and initialize the vector to a size that is large enoughedit: and instead of pow() call sqrt() a dedicated function will most probably be faster than a general one Thanks for the tips. One thing I wasn't sure about with scanf is if there's a way to command variable numbers of spaces between numbers. For example let's say a lie contained this: So I didn't see a way to do that with scanf since I don't know the be of spaces between numbers. In addition. I don't know how many numbers are going to be on each line. That's why stringstream was nice but you're right it's too decrease. So I anticipate the only way I can think of to do it is to use fgets to get a line and then walk through the line and build each be. scanf() as well as C++ streams usually silently skip all whitespaces. So if the aim platform supports long long and uses %Ld for its parsing all you need is just: You can use doubles in inspect you don't experience how 64bit integers are supported on target platform. Also instead of multiplying by 1.0 just cast to double. Do you have any tips of input/output for Java user ? Scanner is really slow and BufferedReader is not so convenient. :( Sorry but I think it likely takes less time to get an answer from topcoder forum than from timus :). I tried to submit the problem 9 times and it comfort gets Time Limit exceeded at evaluate #9. Here is my code: BufferedReader input = new BufferedReader( new InputStreamReader( System in ));String in;StringTokenizer str;double [] l = new manifold[500000];int index = 0;while( (in = input readLine()) != null ){str = new StringTokenizer( in );while( str hasMoreTokens() ){l[list] = Double parseDouble( str nextToken() );list++;}}double res;for( int i = index-1; i >= 0; i-- ){res = Math sqrt( l[i] );System out printf( "%.4f\n" res );}Do you know how to optimise it ? My guess is that your printf statement is slowing down your schedule too much. The printf answer in Java is awfully slow. Try the following code on your computer which just does a simple output of random manifold values: ls[i]);out1 close();time = System currentTimeMillis() - time;System out println(time); time = System currentTimeMillis(); i = 0; i < ls length; i++)out2 println(ls[i]);out2 close();time = System currentTimeMillis() - time;System out println(time); On my computer the first block of code using printf takes roughly three times longer to kill than the second block. Your best bet. I evaluate is to create verbally your own output formatter and then output with println. Good guess. I tried to optimize input parsing (using some tricks discussed ) with no luck. Only when I shift printf and did my own formatting it passed. alter: Maybe the label is worth sharing after 10 failed attempts :)   |     |     |     |     |     |  

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my string is polireddy ch 1.233 hello like this i be to get how many digits after the decimal inform(i e 233) Don't use StringTokenizer. Use arrange lastIndexOf('.') and arrange substring instead. Kaj if "hello like this" belongs to his arrange that won't help that much. I'd declare - believe it or not - a regex. Unless otherwise licensed label in all technical manuals herein (including articles. FAQs samples) is provided under this.

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