Java String equalsIgnoreCase() 方法及示例

String类的equalsIgnoreCase()方法 比较两个字符串，不考虑字符串的大小写（小写或大写）。此方法返回一个布尔值，如果参数不为 null 并且表示忽略大小写的等效字符串，则返回 true，否则返回 false。

句法：

str2.equalsIgnoreCase(str1);

Note: Here str1 and str2 both are the strings that we need to compare.

参数：应该比较的字符串。

返回类型：布尔值，如果参数不为 null 并且表示忽略大小写的等效字符串，则为 true，否则为 false。

插图：

Input : str1 = "pAwAn";
        str2 = "PAWan"
        str2.equalsIgnoreCase(str1);
Output :true

Input : str1 = "powAn";
        str2 = "PAWan"
        str2.equalsIgnoreCase(str1);
Output :false
Explanation: powan and pawan are different strings. 

Note: str1 is a string that needs to be compared with str2.

例子：

Java

// Java Program to Illustrate equalsIgnoreCase() method
 
// Importing required classes
import java.lang.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
 
        // Declaring and initializing strings to compare
        String str1 = "GeeKS FOr gEEks";
        String str2 = "geeKs foR gEEKs";
        String str3 = "ksgee orF geeks";
 
        // Comparing strings
        // If we ignore the cases
        boolean result1 = str2.equalsIgnoreCase(str1);
 
        // Both the strings are equal so display true
        System.out.println("str2 is equal to str1 = "
                           + result1);
 
        // Even if we ignore the cases
        boolean result2 = str2.equalsIgnoreCase(str3);
 
        // Both the strings are not equal so display false
        System.out.println("str2 is equal to str3 = "
                           + result2);
    }
}

输出

str2 is equal to str1 = true
str2 is equal to str3 = false