[javaSE] 标识符大小写

public class VariableDemo {
    public static void test(){
        System.out.println("11");
    }
    public static void tEst(){
        System.out.println("22");
    }    
    /**
     * @param args
     */
    public static void main(String[] args) {
        
        test();//输出 11
    }
}

<?php
class VariableDemo{
    public static function test(){
        echo 11;
    }
    public static function tEst(){
        echo 22;
    }
    public static function main(){
        VariableDemo::test();//输出 Fatal error: Cannot redeclare VariableDemo::tEst()
    }
}
VariableDemo::main();