Java实现Package编译和访问
2024-10-13 00:47:25
Java实现Package编译和访问
说明
- 所有文件都是使用UTF-8编码来写的，请不要用Windows记事本随便打开
- Test.java文件中注释的方法说明了该类是不能访问其方法的
文件目录树
- bin
- Test1.class
- Test2.class
- Test3.class
- classes
- X
- Y
- A.class
- B.class
- Y
- X
- lib
- E.jar
- S
- T
- C.class
- D.class
- T
- S
- E.jar
- src
- A.java
- B.java
- C.java
- D.java
- Test1.java
- Test2.java
- Test3.java
- Makefile
代码一览
/* A.java */
package X.Y;
import java.util.*;
public class A {
public void sayPublic() {
System.out.println("Hi, " + this.getClass() + ". (public)");
}
private void sayPrivate() {
System.out.println("Hi, " + this.getClass() + ". (private)");
}
protected void sayProtected() {
System.out.println("Hi, " + this.getClass() + ". (protected)");
}
void sayDefault() {
System.out.println("Hi, " + this.getClass() + ". (default)");
}
}
/* B.java */
package X.Y;
import java.util.*;
public class B {
public void sayPublic() {
System.out.println("Hi, " + this.getClass() + ". (public)");
}
private void sayPrivate() {
System.out.println("Hi, " + this.getClass() + ". (private)");
}
protected void sayProtected() {
System.out.println("Hi, " + this.getClass() + ". (protected)");
}
void sayDefault() {
System.out.println("Hi, " + this.getClass() + ". (default)");
}
}
/* C.java */
package S.T;
import java.util.*;
public class C {
public void sayPublic() {
System.out.println("Hi, " + this.getClass() + ". (public)");
}
private void sayPrivate() {
System.out.println("Hi, " + this.getClass() + ". (private)");
}
protected void sayProtected() {
System.out.println("Hi, " + this.getClass() + ". (protected)");
}
void sayDefault() {
System.out.println("Hi, " + this.getClass() + ". (default)");
}
}
/* D.java */
package S.T;
import java.util.*;
public class D {
public void sayPublic() {
System.out.println("Hi, " + this.getClass() + ". (public)");
}
private void sayPrivate() {
System.out.println("Hi, " + this.getClass() + ". (private)");
}
protected void sayProtected() {
System.out.println("Hi, " + this.getClass() + ". (protected)");
}
void sayDefault() {
System.out.println("Hi, " + this.getClass() + ". (default)");
}
}
/* Test1.java */
import java.util.*;
import X.Y.*;
import S.T.*;
class Test1 {
public static void main(String[] args) {
A a = new A();
a.sayPublic();
//a.sayPrivate();
//a.sayProtected();
//a.sayDefault();
C c = new C();
c.sayPublic();
//c.sayPrivate();
//c.sayProtected();
//c.sayDefault();
}
}
/* Test2.java */
import java.util.*;
import X.Y.*;
import S.T.*;
class Test2 extends B {
public static void main(String[] args) {
Test2 test2 = new Test2();
test2.sayPublic();
//test2.sayPrivate();
test2.sayProtected();
//test2.sayDefault();
}
}
/* Test3.java */
import java.util.*;
import X.Y.*;
import S.T.*;
class Test3 extends D {
public static void main(String[] args) {
Test3 test3 = new Test3();
test3.sayPublic();
//test3.sayPrivate();
test3.sayProtected();
//test3.sayDefault();
}
}
/* Makefile */
target:
javac -encoding utf-8 ./src/A.java -d ./classes
javac -encoding utf-8 ./src/B.java -d ./classes
javac -encoding utf-8 ./src/C.java -d .
javac -encoding utf-8 ./src/D.java -d .
jar cvf ./lib/E.jar ./S/*
rm -rf ./S
javac -encoding utf-8 -classpath "./lib/E.jar;./classes;" ./src/Test1.java -d ./bin
javac -encoding utf-8 -classpath "./lib/E.jar;./classes;" ./src/Test2.java -d ./bin
javac -encoding utf-8 -classpath "./lib/E.jar;./classes;" ./src/Test3.java -d ./bin
run-Test1:
java -classpath "./bin;./lib/E.jar;./classes;" Test1
run-Test2:
java -classpath "./bin;./lib/E.jar;./classes;" Test2
run-Test3:
java -classpath "./bin;./lib/E.jar;./classes;" Test3
clean:
rm -rf ./bin/*.class
rm -rf ./classes/*
rm -rf ./lib/*.jar
样例代码
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