Java 在需要其功能的类中创建一个内部类。
在需要其功能的类中创建一个内部类。
实例源码：
源代码：
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import java.util.ArrayList;3
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import java.util.List;5
/*6
from nowjava - 时代Java 7
*/8
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public class Main {11
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private Player player;14
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private List<Player> playerList;16
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private int size = 4;18
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/**21
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* Inner class representing a Player object23
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*/25
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class Player {27
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private String firstName = null;30
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private String lastName = null;32
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private String position = null;34
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private int status = -1;36
/** 来 自 时 代 J a v a 公 众 号 - N o w J a v a . c o m**/37
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public Player() {39
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}41
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public Player(String position, int status) {44
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this.position = position;46
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this.status = status;48
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}50
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public String playerString() {53
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return getFirstName() + " " + getLastName() + " - " + getPosition();55
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}57
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/**60
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* @return the firstName62
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*/64
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public String getFirstName() {66
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return firstName;68
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}70
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/**73
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* @param firstName75
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* the firstName to set77
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*/79
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public void setFirstName(String firstName) {81
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this.firstName = firstName;83
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}85
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/**88
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* @return the lastName90
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*/92
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public String getLastName() {94
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return lastName;96
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}98
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/**101
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* @param lastName103
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* the lastName to set105
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*/107
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public void setLastName(String lastName) {109
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this.lastName = lastName;111
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}113
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/**116
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* @return the position118
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*/120
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public String getPosition() {122
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return position;124
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}126
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/**129
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* @param position131
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* the position to set133
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*/135
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public void setPosition(String position) {137
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this.position = position;139
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}141
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/**144
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* @return the status146
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*/148
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public int getStatus() {150
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return status;152
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}154
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/**157
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* @param status159
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* the status to set161
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*/163
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public void setStatus(int status) {165
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this.status = status;167
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}169
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@Override172
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public String toString(){174
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return this.firstName + " " + this.lastName + " - "+ this.position;176
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}178
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}180
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/**183
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* Inner class that constructs the Player objects and adds them to an array185
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* that was declared in the outer class;187
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*/189
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public Main() {191
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final int ACTIVE = 0;194
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// In reality, this would probably read records from a database using197
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// a loop...but for this example we will manually enter the player data.199
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playerList = new ArrayList();201
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playerList.add(constructPlayer("A", "Z", "Right Wing", ACTIVE));203
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playerList.add(constructPlayer("B", "X", "Left Wing", ACTIVE));205
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playerList.add(constructPlayer("C", "Y", "Center", ACTIVE));207
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playerList.add(constructPlayer("D", "W", "Defense", ACTIVE));209
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playerList.add(constructPlayer("E", "G", "Goalie", ACTIVE));211
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}213
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public Player constructPlayer(String first, String last, String position,216
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int status) {218
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Player player = new Player();220
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player.firstName = first;222
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player.lastName = last;224
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