测试contanisAll方法，如何改进不区分字母大小写？

/*

* 测试List的contanisAll方法

*/

private void testListContanisAll() {

System.out.println("请输入课程名称集合，以,分割");

String[] arr = console.next().split(",");

while (true) {

if(arr.length == 0) {

System.out.println("请输入课程名称");

continue;

}else {

for(String name: arr) {

Course course = new Course();

course.name = name;

System.out.println("取得课程为：" + course.name);

System.out.println("备选课程中是否包含课程：" + course.name +

"," + coursesToSelect.contains(course));

}

break;

}

}

}