equals小问题。。。
public class StringComparison { public static void main(String[] args) { String s1 = "java isn't just for breakfast"; String s2 = "JAVA isn't just for breakfast"; if(s1.equals(s2)); System.out.println("The two lines are equal==="); System.out.println("The two lines are not equal----1"); if(s2.equals(s1)) System.out.println("the two lines are equal"); System.out.println("the two lines are not equal------2"); if(s1.equalsIgnoreCase(s2)) System.out.println("But the lines aer equal,ignorring case"); System.out.println("Lines are not equal,even ignoring case"); String s3 = "A cup is a joy forever"; if(s1.equalsIgnoreCase(s3)) System.out.println("two lines are equals"); }}