正则表达式-切割

/*test1*/
        String str="张三，李四，王五";
        String reg=",";
        String[] names= str.split(reg);
        for(String name:names)
        {
            System.out.println(name);
        }

/*test2*/
        String str="张三   李四     王五";
        String reg=" +"
                + "";
        String[] names= str.split(reg);
        for(String name:names)
        {
            System.out.println(name);
        }
        

/*test3*/
        String str="张三.李四.王五";
        String reg="\\.";
        String[] names= str.split(reg);
        for(String name:names)
        {
            System.out.println(name);
        }

/*test4*/
        String str="c:\\abc\\a.txt";
        String reg="\\\\";
        String[] names= str.split(reg);
        for(String name:names)
        {
            System.out.println(name);
        }

/*test5*/
        String str="cbggbgfbfdjhhhgff";
        String reg="(.)\\1+";
        String[] names= str.split(reg);
        for(String name:names)
        {
            System.out.println(name);
        }

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