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Java Reflection - Method.isVarArgs() Examples

Java Reflection Java Java API 

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Class:

java.lang.reflect.Method

java.lang.Objectjava.lang.Objectjava.lang.reflect.AccessibleObjectjava.lang.reflect.AccessibleObjectjava.lang.reflect.AnnotatedElementAnnotatedElementjava.lang.reflect.Executablejava.lang.reflect.Executablejava.lang.reflect.MemberMemberjava.lang.reflect.GenericDeclarationGenericDeclarationjava.lang.reflect.Methodjava.lang.reflect.MethodLogicBig

Method:

public boolean isVarArgs()

Returns true if this method is declared to take a variable number of arguments; returns false otherwise.


Examples


package com.logicbig.example.method;

import java.lang.reflect.Method;

public class IsVarArgsExample {

    public static void main(String... args) throws NoSuchMethodException {
        Method m = IsVarArgsExample.class.getDeclaredMethod("main", String[].class);
        System.out.println(m.isVarArgs());
    }
}

Output

true




package com.logicbig.example.method;

import java.lang.reflect.Method;

public class IsVarArgsExample2 {
    private void parse(int i, Object... args) {}

    private void parse(int i) {}

    public static void main(String... args) throws NoSuchMethodException {
        Method m = IsVarArgsExample2.class.getDeclaredMethod("parse", int.class, Object[].class);
        System.out.println(m.isVarArgs());

        Method m2 = IsVarArgsExample2.class.getDeclaredMethod("parse", int.class);
        System.out.println(m2.isVarArgs());
    }
}

Output

true
false




package com.logicbig.example.method;

import java.lang.reflect.Method;

public class IsVarArgsExample3 {

    public static void main(String... args) {
        for (Method m : String.class.getDeclaredMethods()) {
            if (m.isVarArgs()) {
                System.out.println(m.getName());
                System.out.println(m);
                System.out.println("---");
            }
        }
    }
}

Output

join
public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.CharSequence[])
---
format
public static java.lang.String java.lang.String.format(java.lang.String,java.lang.Object[])
---
format
public static java.lang.String java.lang.String.format(java.util.Locale,java.lang.String,java.lang.Object[])
---

See Also