public abstract Class Constant

Class Inheritance

extends Object

java.lang.Object
org.apache.tomcat.util.bcel.classfile.Constant

Known Direct Subclasses

org.apache.tomcat.util.bcel.classfile.ConstantClass, org.apache.tomcat.util.bcel.classfile.ConstantDouble, org.apache.tomcat.util.bcel.classfile.ConstantFloat, org.apache.tomcat.util.bcel.classfile.ConstantInteger, org.apache.tomcat.util.bcel.classfile.ConstantLong, org.apache.tomcat.util.bcel.classfile.ConstantUtf8

Imports

java.io.DataInput, .IOException, org.apache.tomcat.util.bcel.Const

Abstract superclass for classes to represent the different constant types in the constant pool of a class file. The classes keep closely to the JVM specification.

Field Summary

Modifier and Type	Field and Description
private final byte	tag

Constructor Summary

Access	Constructor and Description
pack-priv	Constant(final byte tag)

Method Summary

Modifier and Type	Method and Description
public final byte	Returns: Tag of constant, i.e., its type. No setTag() method to avoid confusion. getTag()
pack-priv static Constant	Returns: Constant object readConstant(final DataInput Input stream dataInput) Reads one constant from the given input, the type depends on a tag byte.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll wait wait wait

Field Detail

tag	back to summary
private final byte tag

Constructor Detail

Constant	back to summary
pack-priv Constant(final byte tag)

Method Detail

getTag	back to summary
public final byte getTag() Returns:byte Tag of constant, i.e., its type. No setTag() method to avoid confusion.

readConstant back to summary

readConstant	back to summary
pack-priv static Constant readConstant(final DataInput dataInput) throws IOException, ClassFormatException Reads one constant from the given input, the type depends on a tag byte. Parameters dataInput:DataInput Input stream Returns:Constant Constant object Exceptions IOException: if an I/O error occurs reading from the given `dataInput`. ClassFormatException: if the next byte is not recognized

pack-priv static Constant readConstant(final DataInput dataInput) throws IOException, ClassFormatException

Reads one constant from the given input, the type depends on a tag byte.

Parameters

dataInput:DataInput: Input stream

Returns:Constant

Constant object

Exceptions

IOException:: if an I/O error occurs reading from the given dataInput.
ClassFormatException:: if the next byte is not recognized

toString back to summary

toString	back to summary
public String toString() Overrides java.lang.Object.toString. Doc from java.lang.Object.toString. Returns a string representation of the object. Satisfying this method's contract implies a non-`null` result must be returned. Returns:String a string representation of the object Annotations @Override

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object

Annotations

@Override