如何在Java中使用equals()和equalsIgnoreCase()。
该equals()方法
此方法将此字符串与指定对象进行比较。当且仅当参数不为null并且是一个String对象，表示与此对象相同的字符序列时，结果为true。
示例
import java.lang.*;
public class StringDemo {
public static void main(String[] args) {
String str1 = "sachin tendulkar";
String str2 = "amrood admin";
String str3 = "amrood admin";
//检查是否相等
boolean retval1 = str2.equals(str1);
boolean retval2 = str2.equals(str3);
//打印返回值
System.out.println("str2 is equal to str1 = " + retval1);
System.out.println("str2 is equal to str3 = " + retval2);
}
}输出结果
str2 is equal to str1 = false str2 is equal to str3 = true
该equalsIgnoreCase()方法
此方法与该ignoreCase()方法相同，不同之处在于，如果两个字符串的长度相同，并且两个字符串中的对应字符相等，则忽略大小写，而忽略两个字符串。
示例
import java.lang.*;
public class StringDemo {
public static void main(String[] args) {
String str1 = "sachin tendulkar";
String str2 = "amrood admin";
String str3 = "AMROOD ADMIN";
//检查是否相等 with case ignored
boolean retval1 = str2.equalsIgnoreCase(str1);
boolean retval2 = str2.equalsIgnoreCase(str3);
//打印返回值
System.out.println("str2 is equal to str1 = " + retval1);
System.out.println("str2 is equal to str3 = " + retval2);
}
}输出结果
str2 is equal to str1 = false str2 is equal to str3 = true