http://commons.apache.org/lang/: Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. (The Apache Software Foundation)
  • C. Scott Ananian
  • Chris Audley
  • Stephane Bailliez
  • Michael Becke
  • Benjamin Bentmann
  • Ola Berg
  • Nathan Beyer
  • Stefan Bodewig
  • Janek Bogucki
  • Mike Bowler
  • Sean Brown
  • Alexander Day Chaffee
  • Al Chou
  • Greg Coladonato
  • Maarten Coene
  • Justin Couch
  • Michael Davey
  • Norm Deane
  • Ringo De Smet
  • Russel Dittmar
  • Steve Downey
  • Matthias Eichel
  • Christopher Elkins
  • Chris Feldhacker
  • Pete Gieser
  • Jason Gritman
  • Matthew Hawthorne
  • Michael Heuer
  • Chris Hyzer
  • Marc Johnson
  • Shaun Kalley
  • Tetsuya Kaneuchi
  • Nissim Karpenstein
  • Ed Korthof
  • Holger Krauth
  • Rafal Krupinski
  • Rafal Krzewski
  • Craig R. McClanahan
  • Rand McNeely
  • Hendrik Maryns
  • Dave Meikle
  • Nikolay Metchev
  • Kasper Nielsen
  • Tim O'Brien
  • Brian S O'Neill
  • Andrew C. Oliver
  • Alban Peignier
  • Moritz Petersen
  • Dmitri Plotnikov
  • Neeme Praks
  • Eric Pugh
  • Stephen Putman
  • Travis Reeder
  • Antony Riley
  • Scott Sanders
  • Ralph Schaer
  • Henning P. Schmiedehausen
  • Sean Schofield
  • Robert Scholte
  • Reuben Sivan
  • Ville Skytta
  • Jan Sorensen
  • Glen Stampoultzis
  • Scott Stanchfield
  • Jon S. Stevens
  • Sean C. Sullivan
  • Ashwin Suresh
  • Helge Tesgaard
  • Arun Mammen Thomas
  • Masato Tezuka
  • Jeff Varszegi
  • Chris Webb
  • Mario Winterer
  • Stepan Koltsov
  • Holger Hoffstatte
  • Derek C. Ashmore
  • Daniel Rall (CollabNet, Inc.)
  • Stephen Colebourne (SITA ATS Ltd)
  • Henri Yandell ()
  • Steven Caswell ()
  • Robert Burrell Donkin ()
  • Gary D. Gregory (Seagull Software)
  • Phil Steitz ()
  • Fredrik Westermarck ()
  • James Carman (Carman Consulting, Inc.)
  • Niall Pemberton
  • Matt Benson
  • Joerg Schaible
  • Oliver Heger
  • Paul Benedict 
public class org.apache.commons.lang.RandomStringUtils
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.commons.lang.RandomStringUtils
  super_class: java.lang.Object
{
  private static final java.util.Random RANDOM;
    descriptor: Ljava/util/Random;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 46
            new java.util.Random
            dup
            invokespecial java.util.Random.<init>:()V
            putstatic org.apache.commons.lang.RandomStringUtils.RANDOM:Ljava/util/Random;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.commons.lang.RandomStringUtils this
         0: .line 57
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 58
            return
        end local 0 // org.apache.commons.lang.RandomStringUtils this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/commons/lang/RandomStringUtils;

  public static java.lang.String random(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int count
         0: .line 72
            iload 0 /* count */
            iconst_0
            iconst_0
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IZZ)Ljava/lang/String;
            areturn
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  count  I
    MethodParameters:
       Name  Flags
      count  

  public static java.lang.String randomAscii(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // int count
         0: .line 86
            iload 0 /* count */
            bipush 32
            bipush 127
            iconst_0
            iconst_0
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ)Ljava/lang/String;
            areturn
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  count  I
    MethodParameters:
       Name  Flags
      count  

  public static java.lang.String randomAlphabetic(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int count
         0: .line 100
            iload 0 /* count */
            iconst_1
            iconst_0
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IZZ)Ljava/lang/String;
            areturn
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  count  I
    MethodParameters:
       Name  Flags
      count  

  public static java.lang.String randomAlphanumeric(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int count
         0: .line 114
            iload 0 /* count */
            iconst_1
            iconst_1
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IZZ)Ljava/lang/String;
            areturn
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  count  I
    MethodParameters:
       Name  Flags
      count  

  public static java.lang.String randomNumeric(int);
    descriptor: (I)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // int count
         0: .line 128
            iload 0 /* count */
            iconst_0
            iconst_1
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IZZ)Ljava/lang/String;
            areturn
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  count  I
    MethodParameters:
       Name  Flags
      count  

  public static java.lang.String random(int, boolean, boolean);
    descriptor: (IZZ)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // int count
        start local 1 // boolean letters
        start local 2 // boolean numbers
         0: .line 146
            iload 0 /* count */
            iconst_0
            iconst_0
            iload 1 /* letters */
            iload 2 /* numbers */
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ)Ljava/lang/String;
            areturn
        end local 2 // boolean numbers
        end local 1 // boolean letters
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0    count  I
            0    1     1  letters  Z
            0    1     2  numbers  Z
    MethodParameters:
         Name  Flags
      count    
      letters  
      numbers  

  public static java.lang.String random(int, int, int, boolean, boolean);
    descriptor: (IIIZZ)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=7, locals=5, args_size=5
        start local 0 // int count
        start local 1 // int start
        start local 2 // int end
        start local 3 // boolean letters
        start local 4 // boolean numbers
         0: .line 166
            iload 0 /* count */
            iload 1 /* start */
            iload 2 /* end */
            iload 3 /* letters */
            iload 4 /* numbers */
            aconst_null
            getstatic org.apache.commons.lang.RandomStringUtils.RANDOM:Ljava/util/Random;
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ[CLjava/util/Random;)Ljava/lang/String;
            areturn
        end local 4 // boolean numbers
        end local 3 // boolean letters
        end local 2 // int end
        end local 1 // int start
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0    count  I
            0    1     1    start  I
            0    1     2      end  I
            0    1     3  letters  Z
            0    1     4  numbers  Z
    MethodParameters:
         Name  Flags
      count    
      start    
      end      
      letters  
      numbers  

  public static java.lang.String random(int, int, int, boolean, boolean, char[]);
    descriptor: (IIIZZ[C)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=7, locals=6, args_size=6
        start local 0 // int count
        start local 1 // int start
        start local 2 // int end
        start local 3 // boolean letters
        start local 4 // boolean numbers
        start local 5 // char[] chars
         0: .line 190
            iload 0 /* count */
            iload 1 /* start */
            iload 2 /* end */
            iload 3 /* letters */
            iload 4 /* numbers */
            aload 5 /* chars */
            getstatic org.apache.commons.lang.RandomStringUtils.RANDOM:Ljava/util/Random;
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ[CLjava/util/Random;)Ljava/lang/String;
            areturn
        end local 5 // char[] chars
        end local 4 // boolean numbers
        end local 3 // boolean letters
        end local 2 // int end
        end local 1 // int start
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0    count  I
            0    1     1    start  I
            0    1     2      end  I
            0    1     3  letters  Z
            0    1     4  numbers  Z
            0    1     5    chars  [C
    MethodParameters:
         Name  Flags
      count    
      start    
      end      
      letters  
      numbers  
      chars    

  public static java.lang.String random(int, int, int, boolean, boolean, char[], java.util.Random);
    descriptor: (IIIZZ[CLjava/util/Random;)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=10, args_size=7
        start local 0 // int count
        start local 1 // int start
        start local 2 // int end
        start local 3 // boolean letters
        start local 4 // boolean numbers
        start local 5 // char[] chars
        start local 6 // java.util.Random random
         0: .line 228
            iload 0 /* count */
            ifne 2
         1: .line 229
            ldc ""
            areturn
         2: .line 230
      StackMap locals:
      StackMap stack:
            iload 0 /* count */
            ifge 4
         3: .line 231
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Requested random string length "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 0 /* count */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc " is less than 0."
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 233
      StackMap locals:
      StackMap stack:
            iload 1 /* start */
            ifne 10
            iload 2 /* end */
            ifne 10
         5: .line 234
            bipush 123
            istore 2 /* end */
         6: .line 235
            bipush 32
            istore 1 /* start */
         7: .line 236
            iload 3 /* letters */
            ifne 10
            iload 4 /* numbers */
            ifne 10
         8: .line 237
            iconst_0
            istore 1 /* start */
         9: .line 238
            ldc 2147483647
            istore 2 /* end */
        10: .line 242
      StackMap locals:
      StackMap stack:
            iload 0 /* count */
            newarray 5
            astore 7 /* buffer */
        start local 7 // char[] buffer
        11: .line 243
            iload 2 /* end */
            iload 1 /* start */
            isub
            istore 8 /* gap */
        start local 8 // int gap
        12: .line 245
            goto 42
        13: .line 247
      StackMap locals: char[] int
      StackMap stack:
            aload 5 /* chars */
            ifnonnull 16
        14: .line 248
            aload 6 /* random */
            iload 8 /* gap */
            invokevirtual java.util.Random.nextInt:(I)I
            iload 1 /* start */
            iadd
            i2c
            istore 9 /* ch */
        start local 9 // char ch
        15: .line 249
            goto 17
        end local 9 // char ch
        16: .line 250
      StackMap locals:
      StackMap stack:
            aload 5 /* chars */
            aload 6 /* random */
            iload 8 /* gap */
            invokevirtual java.util.Random.nextInt:(I)I
            iload 1 /* start */
            iadd
            caload
            istore 9 /* ch */
        start local 9 // char ch
        17: .line 252
      StackMap locals: int
      StackMap stack:
            iload 3 /* letters */
            ifeq 18
            iload 9 /* ch */
            invokestatic java.lang.Character.isLetter:(C)Z
            ifne 20
        18: .line 253
      StackMap locals:
      StackMap stack:
            iload 4 /* numbers */
            ifeq 19
            iload 9 /* ch */
            invokestatic java.lang.Character.isDigit:(C)Z
            ifne 20
        19: .line 254
      StackMap locals:
      StackMap stack:
            iload 3 /* letters */
            ifne 41
            iload 4 /* numbers */
            ifne 41
        20: .line 256
      StackMap locals:
      StackMap stack:
            iload 9 /* ch */
            ldc 56320
            if_icmplt 28
            iload 9 /* ch */
            ldc 57343
            if_icmpgt 28
        21: .line 257
            iload 0 /* count */
            ifne 24
        22: .line 258
            iinc 0 /* count */ 1
        23: .line 259
            goto 42
        24: .line 261
      StackMap locals:
      StackMap stack:
            aload 7 /* buffer */
            iload 0 /* count */
            iload 9 /* ch */
            castore
        25: .line 262
            iinc 0 /* count */ -1
        26: .line 263
            aload 7 /* buffer */
            iload 0 /* count */
            ldc 55296
            aload 6 /* random */
            sipush 128
            invokevirtual java.util.Random.nextInt:(I)I
            iadd
            i2c
            castore
        27: .line 265
            goto 42
      StackMap locals:
      StackMap stack:
        28: iload 9 /* ch */
            ldc 55296
            if_icmplt 36
            iload 9 /* ch */
            ldc 56191
            if_icmpgt 36
        29: .line 266
            iload 0 /* count */
            ifne 32
        30: .line 267
            iinc 0 /* count */ 1
        31: .line 268
            goto 42
        32: .line 270
      StackMap locals:
      StackMap stack:
            aload 7 /* buffer */
            iload 0 /* count */
            ldc 56320
            aload 6 /* random */
            sipush 128
            invokevirtual java.util.Random.nextInt:(I)I
            iadd
            i2c
            castore
        33: .line 271
            iinc 0 /* count */ -1
        34: .line 272
            aload 7 /* buffer */
            iload 0 /* count */
            iload 9 /* ch */
            castore
        35: .line 274
            goto 42
      StackMap locals:
      StackMap stack:
        36: iload 9 /* ch */
            ldc 56192
            if_icmplt 39
            iload 9 /* ch */
            ldc 56319
            if_icmpgt 39
        37: .line 276
            iinc 0 /* count */ 1
        38: .line 277
            goto 42
        39: .line 278
      StackMap locals:
      StackMap stack:
            aload 7 /* buffer */
            iload 0 /* count */
            iload 9 /* ch */
            castore
        40: .line 280
            goto 42
        41: .line 281
      StackMap locals:
      StackMap stack:
            iinc 0 /* count */ 1
        end local 9 // char ch
        42: .line 245
      StackMap locals:
      StackMap stack:
            iload 0 /* count */
            iinc 0 /* count */ -1
            ifne 13
        43: .line 284
            new java.lang.String
            dup
            aload 7 /* buffer */
            invokespecial java.lang.String.<init>:([C)V
            areturn
        end local 8 // int gap
        end local 7 // char[] buffer
        end local 6 // java.util.Random random
        end local 5 // char[] chars
        end local 4 // boolean numbers
        end local 3 // boolean letters
        end local 2 // int end
        end local 1 // int start
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   44     0    count  I
            0   44     1    start  I
            0   44     2      end  I
            0   44     3  letters  Z
            0   44     4  numbers  Z
            0   44     5    chars  [C
            0   44     6   random  Ljava/util/Random;
           11   44     7   buffer  [C
           12   44     8      gap  I
           15   16     9       ch  C
           17   42     9       ch  C
    MethodParameters:
         Name  Flags
      count    
      start    
      end      
      letters  
      numbers  
      chars    
      random   

  public static java.lang.String random(int, java.lang.String);
    descriptor: (ILjava/lang/String;)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=7, locals=2, args_size=2
        start local 0 // int count
        start local 1 // java.lang.String chars
         0: .line 301
            aload 1 /* chars */
            ifnonnull 2
         1: .line 302
            iload 0 /* count */
            iconst_0
            iconst_0
            iconst_0
            iconst_0
            aconst_null
            getstatic org.apache.commons.lang.RandomStringUtils.RANDOM:Ljava/util/Random;
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ[CLjava/util/Random;)Ljava/lang/String;
            areturn
         2: .line 304
      StackMap locals:
      StackMap stack:
            iload 0 /* count */
            aload 1 /* chars */
            invokevirtual java.lang.String.toCharArray:()[C
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(I[C)Ljava/lang/String;
            areturn
        end local 1 // java.lang.String chars
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0  count  I
            0    3     1  chars  Ljava/lang/String;
    MethodParameters:
       Name  Flags
      count  
      chars  

  public static java.lang.String random(int, char[]);
    descriptor: (I[C)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=7, locals=2, args_size=2
        start local 0 // int count
        start local 1 // char[] chars
         0: .line 320
            aload 1 /* chars */
            ifnonnull 2
         1: .line 321
            iload 0 /* count */
            iconst_0
            iconst_0
            iconst_0
            iconst_0
            aconst_null
            getstatic org.apache.commons.lang.RandomStringUtils.RANDOM:Ljava/util/Random;
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ[CLjava/util/Random;)Ljava/lang/String;
            areturn
         2: .line 323
      StackMap locals:
      StackMap stack:
            iload 0 /* count */
            iconst_0
            aload 1 /* chars */
            arraylength
            iconst_0
            iconst_0
            aload 1 /* chars */
            getstatic org.apache.commons.lang.RandomStringUtils.RANDOM:Ljava/util/Random;
            invokestatic org.apache.commons.lang.RandomStringUtils.random:(IIIZZ[CLjava/util/Random;)Ljava/lang/String;
            areturn
        end local 1 // char[] chars
        end local 0 // int count
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0  count  I
            0    3     1  chars  [C
    MethodParameters:
       Name  Flags
      count  
      chars  
}
SourceFile: "RandomStringUtils.java"