命令模式
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建立一个接口: 两个类继承这个接口: 定义数组的处理类: 测试程序:(传入不同的类对象,实现选择不同的处理方法)
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package
com;
public
interface
Command {
void
process(
int
[] target);
}
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package
com;
public
class
PrintCommand
implements
Command {
public
void
process(
int
[] target)
{
for
(
int
tmp:target)
{
System.out.println(
"迭代输出数组的元素:"
+tmp);
}
}
}
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package
com;
public
class
AddCommand
implements
Command {
public
void
process(
int
[] target)
{
int
sum=
0
;
for
(
int
tmp:target)
{
sum+=tmp;
}
System.out.println(
"数组元素的总和是:"
+sum);
}
}
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package
com;
public
class
ProcessArray {
public
void
process(
int
[] target,Command cmd)
{
cmd.process(target);
}
}
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package
com;
public
class
CommandTest {
public
static
void
main(String[] args)
{
ProcessArray pa=
new
ProcessArray();
int
[] target={
3
,-
4
,
6
,
4
};
pa.process(target,
new
PrintCommand());
pa.process(target,
new
AddCommand());
}
}
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