【初心者向け】Javaでの文字列と文字列の比較方法

public class StringSample4 { public static void main(String[] args) { String str1 = "朝"; //[1] String str2 = "朝"; //[2] String str3 = new String("朝"); //[3] String str4 = "朝日"; //[4] String str5 = str1 + "日"; //[5] //「==」演算子を使用 System.out.println(str1 == str2); //[6] System.out.println(str2 == str3); //[7] System.out.println(str1 == str3); //[8] System.out.println(str4 == str5); //[9] System.out.p