String str6 = "hello";
String str7 = "HELLO";
System.out.println(str6.equalsIgnoreCase(str7));
System.out.println(str6.replaceAll("l", "8")); //将所有的L替换成8
String str6 = "hello";
String str7 = "HELLO";
System.out.println(str6.equalsIgnoreCase(str7));
System.out.println(str6.replaceAll("l", "8")); //将所有的L替换成8