Revised: Jan./3rd/2004; Since: Dec./21st/2003
private
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PrivateFieldDemo.java
:
class PrivateField { private String name; PrivateField(String aName) { name = aName; } public String getName() { return name; } public void setName(String aName) { // $BF1$8%/%i%9$@$+$i%"%/%;%92DG=(B name = aName; } public void setName(PrivateField obj, String aName) { // $BJL$N%*%V%8%'%/%H$G$bF1$8%/%i%9$@$+$i%"%/%;%92DG=(B obj.name = aName; } } class PrivateFieldDemo { public static void main(String[] args) { PrivateField obj1 = new PrivateField("suzuki"); PrivateField obj2 = new PrivateField("tochihara"); System.out.println("obj1.name(): " + obj1.getName()); System.out.println("obj2.name(): " + obj2.getName()); obj1.setName("hiroe"); obj1.setName(obj2, "sekiya"); System.out.println("obj1.name(): " + obj1.getName()); System.out.println("obj2.name(): " + obj2.getName()); } }
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C:\java>javac PrivateFieldDemo.java
C:\java>java PrivateFieldDemo
obj1.name(): suzuki
obj2.name(): tochihara
obj1.name(): hiroe
obj2.name(): sekiya
C:\java>
$B%a%=%C%I$N(B
private
PrivateOverrideDemo.java
:
class PrivateSuper {
private String msg = "Bye";
private String getPrivateMsg() {
return msg;
}
}
class PrivateOverride extends PrivateSuper{
private String msg = "Hello";
private String getPrivateMsg() { // private $B%a%=%C%I$N%*!<%P!<%i%$%I$N$h$&$K8+$($k(B
// String str = super.msg; // javac Error
// String str = super.getPrivateMsg(); // javac Error
String str = msg;
return str;
}
public String getMsg() {
return this.getPrivateMsg();
}
}
class PrivateOverrideDemo {
public static void main(String[] rags) {
PrivateOverride obj = new PrivateOverride();
// System.out.println(obj.getPrivateMsg()); // javac Error
System.out.println(obj.getMsg());
}
}
$B%3%s%9%H%i%/%?$N(B private
class SingletonDemo {
private static SingletonDemo obj = new SingletonDemo();
private SingletonDemo() {
// $BE,Ev$J=i4|2=(B
}
public Singleton getSingletonInstance() {
return obj;
}
}
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