https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar 
public class org.eclipse.collections.impl.block.procedure.AppendStringProcedure<T> implements org.eclipse.collections.api.block.procedure.Procedure<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.procedure.AppendStringProcedure
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private final java.lang.Appendable appendable;
    descriptor: Ljava/lang/Appendable;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.lang.String separator;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private boolean first;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  public void <init>(java.lang.Appendable, java.lang.String);
    descriptor: (Ljava/lang/Appendable;Ljava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.block.procedure.AppendStringProcedure this
        start local 1 // java.lang.Appendable appendable
        start local 2 // java.lang.String separator
         0: .line 24
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 22
            aload 0 /* this */
            iconst_1
            putfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.first:Z
         2: .line 26
            aload 0 /* this */
            aload 1 /* appendable */
            putfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.appendable:Ljava/lang/Appendable;
         3: .line 27
            aload 0 /* this */
            aload 2 /* separator */
            putfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.separator:Ljava/lang/String;
         4: .line 28
            return
        end local 2 // java.lang.String separator
        end local 1 // java.lang.Appendable appendable
        end local 0 // org.eclipse.collections.impl.block.procedure.AppendStringProcedure this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    5     0        this  Lorg/eclipse/collections/impl/block/procedure/AppendStringProcedure<TT;>;
            0    5     1  appendable  Ljava/lang/Appendable;
            0    5     2   separator  Ljava/lang/String;
    MethodParameters:
            Name  Flags
      appendable  
      separator   

  public void value();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // org.eclipse.collections.impl.block.procedure.AppendStringProcedure this
        start local 1 // java.lang.Object each
         0: .line 35
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.first:Z
            ifeq 3
         1: .line 37
            aload 0 /* this */
            iconst_0
            putfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.first:Z
         2: .line 38
            goto 4
         3: .line 41
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.appendable:Ljava/lang/Appendable;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.separator:Ljava/lang/String;
            invokeinterface java.lang.Appendable.append:(Ljava/lang/CharSequence;)Ljava/lang/Appendable;
            pop
         4: .line 43
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.procedure.AppendStringProcedure.appendable:Ljava/lang/Appendable;
            aload 1 /* each */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokeinterface java.lang.Appendable.append:(Ljava/lang/CharSequence;)Ljava/lang/Appendable;
            pop
         5: .line 44
            goto 8
         6: .line 45
      StackMap locals:
      StackMap stack: java.io.IOException
            astore 2 /* e */
        start local 2 // java.io.IOException e
         7: .line 47
            new java.lang.RuntimeException
            dup
            aload 2 /* e */
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/Throwable;)V
            athrow
        end local 2 // java.io.IOException e
         8: .line 49
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.lang.Object each
        end local 0 // org.eclipse.collections.impl.block.procedure.AppendStringProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0  this  Lorg/eclipse/collections/impl/block/procedure/AppendStringProcedure<TT;>;
            0    9     1  each  TT;
            7    8     2     e  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           0     5       6  Class java.io.IOException
    Signature: (TT;)V
    MethodParameters:
      Name  Flags
      each  
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/procedure/Procedure<TT;>;
SourceFile: "AppendStringProcedure.java"