String字符串截取几种方法

public static void main(String[] args) {
		String a="abcd-efg";
		String a1=a.substring(a.lastIndexOf("-")+1);
		String a2=a.substring(0,a.indexOf("-"));
		System.out.println(a1);//efg
		System.out.println(a2);//abcd
		String b="620303197010141212";
		if(b.length() == 18){
			String sex = b.substring(16, 17);
			System.out.println(sex);
			if(Integer.parseInt(sex)%2==0){
				enfore_sex.setText("女");
			}else{
				enfore_sex.setText("男");
			}
		}

		String c="陕C38205(黄)色";
		String c1=c.substring(c.lastIndexOf(")")+1);
		String c2=c.substring(0,c.indexOf("("));
		String c3=c.replace("(","");
		c3=c3.replace(")","");
		String c5=c.substring(c.indexOf("(")+1,c.indexOf(")"));
		System.out.println(c1);//色
		System.out.println(c2);//陕C38205
		System.out.println(c3);//陕C38205黄色
		System.out.println(c5);//黄
	}