各位老兄帮个忙指点下以下程序的运算流程啦,我看了不怎么明的呢??
对个toSTring()方法一行般在什么时候被调用的呢?
//: Snake.java
// Tests cloning to see if destination of
// handles are also cloned.public class Snake implements Cloneable {
private Snake next;
private char c;
// Value of i == number of segments
Snake(int i, char x) {
c = x;
if(--i > 0){
next = new Snake(i, (char)(x + 1));
}
}
void increment() {
c++;
if(next != null)
next.increment();
}
public String toString() {
String s = ":" + c;
if(next != null){
s += next.toString();
}
System.out.println(s);
return s;
}
public Object clone() {
Object o = null;
try {
o = super.clone();
} catch (CloneNotSupportedException e) {}
return o;
}
public static void main(String[] args) {
Snake s = new Snake(5, 'a');
System.out.println("s = " + s);
Snake s2 = (Snake)s.clone();
System.out.println("s2 = " + s2);
s.increment();
System.out.println(
"after s.increment, s2 = " + s2);
}
} ///:~
对个toSTring()方法一行般在什么时候被调用的呢?
//: Snake.java
// Tests cloning to see if destination of
// handles are also cloned.public class Snake implements Cloneable {
private Snake next;
private char c;
// Value of i == number of segments
Snake(int i, char x) {
c = x;
if(--i > 0){
next = new Snake(i, (char)(x + 1));
}
}
void increment() {
c++;
if(next != null)
next.increment();
}
public String toString() {
String s = ":" + c;
if(next != null){
s += next.toString();
}
System.out.println(s);
return s;
}
public Object clone() {
Object o = null;
try {
o = super.clone();
} catch (CloneNotSupportedException e) {}
return o;
}
public static void main(String[] args) {
Snake s = new Snake(5, 'a');
System.out.println("s = " + s);
Snake s2 = (Snake)s.clone();
System.out.println("s2 = " + s2);
s.increment();
System.out.println(
"after s.increment, s2 = " + s2);
}
} ///:~
解决方案 »
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