循环应该"保持"在同一记录上,直到输入有效的State
。有效选项被记录为警告:[undefined, x, o, c, a, l, d]
但显然,循环只会继续到下一条记录。
应成为"无限"循环,直到收到有效输入。
thufir@dur:~$
thufir@dur:~$ java -jar NetBeansProjects/Client/dist/Client.jar
Jul 07, 2014 5:23:39 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 1
phone 456465
title record number 1
state x
enter the state for record:fjdkfjd
Jul 07, 2014 5:23:43 AM net.bounceme.dur.client.driver.Client inputOutput
WARNING: [undefined, x, o, c, a, l, d]
Jul 07, 2014 5:23:43 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 2
phone 123
title second record
state o
enter the state for record:^Cthufir@dur:~$
thufir@dur:~$
代码:
package net.bounceme.dur.client.driver;
import net.bounceme.dur.data.Title;
import java.net.*;
import java.io.*;
import java.util.Arrays;
import java.util.logging.Logger;
import net.bounceme.dur.data.State;
public class Client {
private static final Logger log = Logger.getLogger(Client.class.getName());
private String server = "localhost";
private int portNumber = 8080;
private final Console c = System.console();
private Client() {
}
public Client(String server, int portNumber) {
this.server = server;
this.portNumber = portNumber;
}
public void inputOutput() throws IOException, ClassNotFoundException {
Socket socket = new Socket(server, portNumber);
boolean eof = false;
Title title = null;
String stringState = null;
State state = State.undefined;
try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(socket.getOutputStream());
ObjectInputStream objectInputStream = new ObjectInputStream(socket.getInputStream())) {
do {
try {
title = (Title) objectInputStream.readObject();
log.info(title.toString());
do {
c.printf("enter the state for record:");
stringState = null;
state = State.undefined;
try {
stringState = c.readLine();
state = State.valueOf(stringState);
} catch (java.lang.IllegalArgumentException iae) {
log.warning(Arrays.deepToString(State.values()));
}
} while (title.getState() == State.undefined);
title.setState(state);
log.fine(title.toString());
title.setTitle("modified from client");
objectOutputStream.writeObject(title);
} catch (java.io.EOFException eofe) {
eof = true;
}
} while (!eof);
}
}
}
package net.bounceme.dur.data;
public enum State {
undefined(0), x(1), o(2), c(3), a(4), l(5), d(6);
private int code = 0;
State(int code) {
this.code = code;
}
public int getCode() {
return this.code;
}
public static State getState(int i) {
for (State state : State.values()) {
if (state.getCode() == i) {
return state;
}
}
return undefined;
}
}
我认为我已经完成了循环,但不幸的是,无法看到问题所在。
答案 0 :(得分:2)
do {
c.printf("enter the state for record:");
stringState = null;
state = State.undefined;
try {
stringState = c.readLine();
state = State.valueOf(stringState);
} catch (java.lang.IllegalArgumentException iae) {
log.warning(Arrays.deepToString(State.values()));
}
} while (title.getState() == State.undefined);
问题出在while (title.getState() == State.undefined);
,你永远不会改变标题的状态,并且它的状态不是“未分类的”。现在将它与未定义的状态进行比较,这将始终为false。所以内部while循环在那里结束。
使用yure变量状态或设置为true的布尔值,如果输入正确,则将其设置为false,这样就可以摆脱内部while循环。
试试这个:
do {
c.printf("enter the state for record:");
stringState = null;
state = State.undefined;
try {
stringState = c.readLine();
state = State.valueOf(stringState);
} catch (java.lang.IllegalArgumentException iae) {
log.warning(Arrays.deepToString(State.values()));
}
} while (state == State.undefined);
修改强> 就像我现在看到的那样,你之前的代码是正确的,因为你将状态与State.undefined进行了比较,但是你改变了它,所以while循环在一轮之后结束。
答案 1 :(得分:0)
这不是一个复杂的场景。你可以尝试如下
boolean status=true;
while(status){
if("matching_input".equals(your_input)){
status=false;
// now loop will exit
}
}
答案 2 :(得分:0)
试错法解决方案:
package net.bounceme.dur.client.driver;
import net.bounceme.dur.data.Title;
import java.net.*;
import java.io.*;
import java.util.Arrays;
import java.util.logging.Logger;
import net.bounceme.dur.data.State;
public class Client {
private static final Logger log = Logger.getLogger(Client.class.getName());
private String server = "localhost";
private int portNumber = 8080;
private final Console c = System.console();
private Client() {
}
public Client(String server, int portNumber) {
this.server = server;
this.portNumber = portNumber;
}
public void inputOutput() throws IOException, ClassNotFoundException {
Socket socket = new Socket(server, portNumber);
boolean eof = false;
Title title = null;
String stringState = null;
State state = State.undefined;
try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(socket.getOutputStream());
ObjectInputStream objectInputStream = new ObjectInputStream(socket.getInputStream())) {
do {
try {
title = (Title) objectInputStream.readObject();
do {
try {
log.info(title.toString());
c.printf("enter the state for record:");
stringState = null;
state = State.undefined;
stringState = c.readLine();
state = State.valueOf(stringState);
log.warning(state.toString());
} catch (java.lang.IllegalArgumentException iae) {
log.warning(Arrays.deepToString(State.values()));
}
} while (state == State.undefined);
title.setState(state);
log.fine(title.toString());
title.setTitle("modified from client");
objectOutputStream.writeObject(title);
} catch (java.io.EOFException eofe) {
eof = true;
}
} while (!eof);
}
}
}
虽然我无法想象是什么打破了它,因为我记得,它之前正在循环。
输出:
thufir@dur:~$
thufir@dur:~$ java -jar NetBeansProjects/Client/dist/Client.jar
Jul 07, 2014 5:41:33 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 1
phone 456465
title record number 1
state undefined
enter the state for record:fjdskl
Jul 07, 2014 5:41:36 AM net.bounceme.dur.client.driver.Client inputOutput
WARNING: [undefined, x, o, c, a, l, d]
Jul 07, 2014 5:41:36 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 1
phone 456465
title record number 1
state undefined
enter the state for record:fjdksl
Jul 07, 2014 5:41:37 AM net.bounceme.dur.client.driver.Client inputOutput
WARNING: [undefined, x, o, c, a, l, d]
Jul 07, 2014 5:41:37 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 1
phone 456465
title record number 1
state undefined
enter the state for record:a
Jul 07, 2014 5:41:38 AM net.bounceme.dur.client.driver.Client inputOutput
WARNING: a
Jul 07, 2014 5:41:38 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 2
phone 123
title second record
state o
enter the state for record:fjklds
Jul 07, 2014 5:41:42 AM net.bounceme.dur.client.driver.Client inputOutput
WARNING: [undefined, x, o, c, a, l, d]
Jul 07, 2014 5:41:42 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 2
phone 123
title second record
state o
enter the state for record:c
Jul 07, 2014 5:41:46 AM net.bounceme.dur.client.driver.Client inputOutput
WARNING: c
Jul 07, 2014 5:41:46 AM net.bounceme.dur.client.driver.Client inputOutput
INFO:
id 3
phone 14564654
title etc
state x
enter the state for record:^C
thufir@dur:~$