update method reference

CodeCoderCoding · CodeCoderCoding · commit 411c8369defd · 2023-01-18T13:23:48.000+08:00
diff --git a/src/ABasic/A7Method/MethodReference.java b/src/ABasic/A7Method/MethodReference.java
@@ -3,14 +3,32 @@
 public class MethodReference {
     public static void main(String[] args) {
         Person person=new Person("name", 18, "black");
+        // person1还是person1，hashCode相同
         Person person1=new Person("name1", 19);
         System.out.println(person1.toString());
         copyAttribute(person, person1);
         System.out.println(person1.toString());
+        // person2发生了变化，hashCode不同
+        Person person2=new Person("name2", 20);
+        System.out.println(person2.toString());
+        person2=copyAttribute2();
+        System.out.println(person2);
+        person2=copyAttribute3();
+        System.out.println(person2);
     }
 
     public static void copyAttribute(Person person, Person person1){
         person1.setEyeColor(person.getEyeColor());
     }
 
+    public static Person copyAttribute2(){
+        Person person=new Person("name", 20, "red");
+        return person;
+    }
+
+    public static Person copyAttribute3(){
+        Person person=new Person("name", 20, "blue");
+        return person;
+    }
+
 }
diff --git a/src/ABasic/A7Method/Person.java b/src/ABasic/A7Method/Person.java
@@ -67,7 +67,7 @@ public void setBirthday(Date birthday) {
      */
     @Override
     public String toString() {
-        String string="name: "+name+", age: "+age+", eyeColor: "+eyeColor;
+        String string="hashCode: "+hashCode()+", name: "+name+", age: "+age+", eyeColor: "+eyeColor;
         return string;
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -67,7 +67,7 @@ public void setBirthday(Date birthday) {`
`67`	`67`	`*/`
`68`	`68`	`@Override`
`69`	`69`	`public String toString() {`
`70`		`- String string="name: "+name+", age: "+age+", eyeColor: "+eyeColor;`
	`70`	`+ String string="hashCode: "+hashCode()+", name: "+name+", age: "+age+", eyeColor: "+eyeColor;`
`71`	`71`	`return string;`
`72`	`72`	`}`
`73`	`73`	`}`