java中的清理问题 s.dispose(); 这有什么用???
classComponent1{Component1(){println("Component1()");}voiddispose(){println("Componen...
class Component1 {
Component1() { println("Component1()"); }
void dispose() { println("Component1.dispose()"); }
}
class Component2 {
Component2() { println("Component2()"); }
void dispose() { println("Component2.dispose()"); }
}
class Component3 {
Component3() { println("Component3()"); }
void dispose() { println("Component3.dispose()"); }
}
class Root2 {
Component1 c1root;
Component2 c2root;
Component3 c3root;
Root2() {
println("Root()");
c1root = new Component1();
c2root = new Component2();
c3root = new Component3();
}
void dispose() {
c3root.dispose();
c2root.dispose();
c1root.dispose();
println("Root2.dispose()");
}
}
class Stem2 extends Root2 {
Component1 c1stem;
Component2 c2stem;
Component3 c3stem;
Stem2() {
super();
println("Stem2()");
c1stem = new Component1();
c2stem = new Component2();
c3stem = new Component3();
}
void dispose() {
c3stem.dispose();
c2stem.dispose();
c1stem.dispose();
super.dispose();
println("Stem2.dispose()");
}
public static void main(String[] args) {
Stem2 s = new Stem2();
try {
// Code and exception handling...
} finally {
s.dispose();这有什么用???
}
}
} 展开
Component1() { println("Component1()"); }
void dispose() { println("Component1.dispose()"); }
}
class Component2 {
Component2() { println("Component2()"); }
void dispose() { println("Component2.dispose()"); }
}
class Component3 {
Component3() { println("Component3()"); }
void dispose() { println("Component3.dispose()"); }
}
class Root2 {
Component1 c1root;
Component2 c2root;
Component3 c3root;
Root2() {
println("Root()");
c1root = new Component1();
c2root = new Component2();
c3root = new Component3();
}
void dispose() {
c3root.dispose();
c2root.dispose();
c1root.dispose();
println("Root2.dispose()");
}
}
class Stem2 extends Root2 {
Component1 c1stem;
Component2 c2stem;
Component3 c3stem;
Stem2() {
super();
println("Stem2()");
c1stem = new Component1();
c2stem = new Component2();
c3stem = new Component3();
}
void dispose() {
c3stem.dispose();
c2stem.dispose();
c1stem.dispose();
super.dispose();
println("Stem2.dispose()");
}
public static void main(String[] args) {
Stem2 s = new Stem2();
try {
// Code and exception handling...
} finally {
s.dispose();这有什么用???
}
}
} 展开
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