我把你的修改了下,你自己看看,LS说的自动复写也可以,eclips有这样的功能。class A { private String name; private String idstr; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getIdstr() { return idstr; } public void setIdstr(String idstr) { this.idstr = idstr; } public A() { } A(String name, String idstr) { this.name = name; this.idstr = idstr; } public boolean equals(Object obj) { if (this == obj) { return true; } if (obj != null && (obj instanceof A)) { A AObj = (A) obj; System.out.println(AObj.idstr); if ((this.idstr).equals(AObj.idstr)) { return true; } } return false; } }public class B { public static void main(String[] args) { A p1 = new A("孙悟空", "shanghai"); A p2 = new A("孙行者", "xi'an"); A p3 = new A("孙悟饭", "shanghai"); System.out.println("p1,p2是否相等:" + p1.equals(p2)); System.out.println("p2,p3是否相等:" + p2.equals(p3)); System.out.println("p2,p3是否相等:" + p1.equals(p3)); } }
class A { private String name; private String idstr; public A(String name){ this.name = name; } A(String name, String idstr) { this.name = name; this.idstr = idstr; } public boolean equals(Object obj) { if (this == obj) { return true; } if (obj != null && obj instanceof A) { A a = (A)obj; if (this.getName().equals(a.getName())){ return true; } } return false; } public String getIdstr() { return idstr; } public void setIdstr(String idstr) { this.idstr = idstr; } public String getName() { return name; } public void setName(String name) { this.name = name; } } class Person1 extends A{
public Person1(String name) { super(name); } } public class B { public static void main(String[] args) { A p1 = new A("孙悟空"); A p2 = new Person1("孙悟空"); A p3 = new A("孙悟饭"); System.out.println("p1,p2是否相等:" + p1.equals(p2)); System.out.println("p2,p3是否相等:" + p2.equals(p3)); } } //楼主好好打基础,基础不行,写代码会很累的。
编译过程中出现E:\xiti>javac B.java .\Object.java:5: 需要 '{' public class Welcom extendx Applet implemen ActionListene ^ .\Object.java:12: 非法字符: \65306 lb=new Lable(请输入您的名字:); ^ .\Object.java:5: 类 Welcom 是公共的,应在名为 Welcom.java public class Welcom extendx Applet implemen ActionListene ^ B.java:31: 无法访问 Object 错误的类文件: .\Object.java 文件不包含类 Object 请删除该文件或确保该文件位于正确的类路径子目录中。 public boolean equals(Object obj) { ^E:\xiti>
{
private String name;
private String idstr;
public A(){}
A(String name,String idstr)
{
this.name=name;
this.idstr=idstr;}
public boolean equals(Object obj)
{
if (shis==obj) //shis ?? 应该是this吧???
{
return true;
}if(obj!=null&&(obj.getclass()).eqauls (A.class))
{
A AObj=(A)obj;
if((this.getidstr()).equals(Aobj.getidstr()))
{
return true;}
}
return false;
}
} public class B
{
public static void main(String[]args)
{
A p1=new A("孙悟空");
A p2=new Person("孙行者");
A p3=new A("孙悟饭");
System.out.println("p1,p2是否相等:"+p1.equals(p2));
System.out.println("p2,p3是否相等:"+p2.equals(p3));}
}代码真心 很乱……………… 你的……
....
}
private String name;
private String idstr; public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getIdstr() {
return idstr;
} public void setIdstr(String idstr) {
this.idstr = idstr;
} public A() {
} A(String name, String idstr) {
this.name = name;
this.idstr = idstr; } public boolean equals(Object obj) {
if (this == obj) {
return true;
} if (obj != null && (obj instanceof A)) {
A AObj = (A) obj;
System.out.println(AObj.idstr);
if ((this.idstr).equals(AObj.idstr)) {
return true; }
}
return false;
}
}public class B {
public static void main(String[] args) {
A p1 = new A("孙悟空", "shanghai");
A p2 = new A("孙行者", "xi'an");
A p3 = new A("孙悟饭", "shanghai");
System.out.println("p1,p2是否相等:" + p1.equals(p2));
System.out.println("p2,p3是否相等:" + p2.equals(p3));
System.out.println("p2,p3是否相等:" + p1.equals(p3)); }
}
class A {
private String name;
private String idstr;
public A(String name){
this.name = name;
}
A(String name, String idstr) {
this.name = name;
this.idstr = idstr;
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj != null && obj instanceof A) {
A a = (A)obj;
if (this.getName().equals(a.getName())){
return true;
}
}
return false;
}
public String getIdstr() {
return idstr;
}
public void setIdstr(String idstr) {
this.idstr = idstr;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
class Person1 extends A{
public Person1(String name) {
super(name);
}
}
public class B {
public static void main(String[] args) {
A p1 = new A("孙悟空");
A p2 = new Person1("孙悟空");
A p3 = new A("孙悟饭");
System.out.println("p1,p2是否相等:" + p1.equals(p2));
System.out.println("p2,p3是否相等:" + p2.equals(p3));
}
}
//楼主好好打基础,基础不行,写代码会很累的。
.\Object.java:5: 需要 '{'
public class Welcom extendx Applet implemen ActionListene
^
.\Object.java:12: 非法字符: \65306
lb=new Lable(请输入您的名字:);
^
.\Object.java:5: 类 Welcom 是公共的,应在名为 Welcom.java
public class Welcom extendx Applet implemen ActionListene
^
B.java:31: 无法访问 Object
错误的类文件: .\Object.java
文件不包含类 Object
请删除该文件或确保该文件位于正确的类路径子目录中。
public boolean equals(Object obj) {
^E:\xiti>