鍦↗ava涓紝鎴戜滑鍙互浣跨敤"==鈥滆繍绠楃鎴栬€卐quals()鏂规硶鏉ュ垽鏂袱涓瓧绗︿覆鏄惁鐩哥瓑銆備絾鏄娉ㄦ剰锛屼娇鐢ㄢ€?="杩愮畻绗︽瘮杈冪殑鏄袱涓瓧绗︿覆瀵硅薄鐨勫紩鐢紝鑰屼笉鏄畠浠殑鍐呭銆傚洜姝わ紝濡傛灉涓や釜瀛楃涓插璞″紩鐢ㄧ殑鏄悓涓€涓璞★紝閭ｄ箞瀹冧滑鏄浉绛夌殑锛涘鏋滃畠浠紩鐢ㄧ殑鏄笉鍚岀殑瀵硅薄锛屽嵆浣垮唴瀹圭浉鍚岋紝瀹冧滑涔熸槸涓嶇浉绛夌殑銆?/p>

浠ヤ笅鏄袱绉嶅垽鏂袱涓瓧绗︿覆涓嶇浉绛夌殑鏂规硶锛?/p>

1. 浣跨敤"=="杩愮畻绗︼細

String str1 = "Hello";
String str2 = "World";
if (str1 == str2) {
    System.out.println("瀛楃涓茬浉绛?quot;);
} else {
    System.out.println("瀛楃涓蹭笉鐩哥瓑");
}

2. 浣跨敤equals()鏂规硶锛?/li>

String str1 = "Hello";
String str2 = "World";
if (str1.equals(str2)) {
    System.out.println("瀛楃涓茬浉绛?quot;);
} else {
    System.out.println("瀛楃涓蹭笉鐩哥瓑");
}

娉ㄦ剰锛氬湪浣跨敤equals()鏂规硶姣旇緝鏃讹紝瑕佺‘淇濆瓧绗︿覆瀵硅薄涓嶄负null锛屽惁鍒欎細鎶涘嚭NullPointerException寮傚父銆傚鏋滄兂瑕佸拷鐣ュ瓧绗︿覆鐨勫ぇ灏忓啓杩涜姣旇緝锛屽彲浠ヤ娇鐢╡qualsIgnoreCase()鏂规硶銆?/p>