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Interface MethodBuilder

All Superinterfaces:: ClassFileBuilder<MethodElement, MethodBuilder>, Consumer<MethodElement>

public sealed interface MethodBuilder extends ClassFileBuilder<MethodElement, MethodBuilder>

A builder for methods. The main way to obtain a method builder is via ClassBuilder.withMethod(String, MethodTypeDesc, int, Consumer). ClassBuilder.withMethodBody(String, MethodTypeDesc, int, Consumer) is useful if no attribute on the method except Code needs to be configured, skipping the method handler.

Refer to ClassFileBuilder for general guidance and caution around the use of builders for structures in the class file format.

See Java Virtual Machine Specification:

4.6 Methods

Since:

See Also:

Method Summary

Modifier and Type	Method	Description
`MethodBuilder`	`transformCode(CodeModel code, CodeTransform transform)`	Build the method body for this method by transforming the body of another method.
`MethodBuilder`	`withCode(Consumer<? super CodeBuilder> code)`	Build the method body for this method.
`default MethodBuilder`	`withFlags(int flags)`	Sets the method access flags.
`default MethodBuilder`	`withFlags(AccessFlag... flags)`	Sets the method access flags.

Methods declared in interface ClassFileBuilder

accept, constantPool, transform, with

Methods declared in interface Consumer

andThen

Method Details

withFlags

default MethodBuilder withFlags(int flags)

Sets the method access flags. The AccessFlag.STATIC flag cannot be modified after the builder is created.

Parameters:

flags - the access flags, as a bit mask

Returns:

this builder

Throws:

IllegalArgumentException - if the ACC_STATIC flag is modified

See Also:

withFlags

default MethodBuilder withFlags(AccessFlag... flags)

Sets the method access flags. The AccessFlag.STATIC flag cannot be modified after the builder is created.

Parameters:

flags - the access flags, as a bit mask

Returns:

this builder

Throws:

IllegalArgumentException - if the ACC_STATIC flag is modified

See Also:

withCode

MethodBuilder withCode(Consumer<? super CodeBuilder> code)

Build the method body for this method.

Parameters:

code - a handler receiving a CodeBuilder

Returns:

this builder

See Also:

transformCode

MethodBuilder transformCode(CodeModel code, CodeTransform transform)

Build the method body for this method by transforming the body of another method.

This method behaves as if:

withCode(cob -> cob.transform(code, transform));

Parameters:

code - the method body to be transformed

transform - the transform to apply to the method body

Returns:

this builder

See Also:

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https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/classfile/MethodBuilder.html