}
73
74 // 将字元數組cbuf寫入到緩沖中，從cbuf的off位置開始寫入，寫入長度是len。
75 public void write(char cbuf[], int off, int len) throws IOException {
76 synchronized (lock) {
77 ensureOpen();
78 if ((off < 0) || (off > cbuf.length) || (len < 0) ||
79 ((off + len) > cbuf.length) || ((off + len) < 0)) {
80 throw new IndexOutOfBoundsException();
81 } else if (len == 0) {
82 return;
83 }
84
85 if (len >= nChars) {
86
89 flushBuffer();
90 out.write(cbuf, off, len);
91 return;
92 }
93
94 int b = off, t = off + len;
95 while (b < t) {
96 int d = min(nChars - nextChar, t - b);
97 System.arraycopy(cbuf, b, cb, nextChar, d);
98 b += d;
99 nextChar += d;
100 if (nextChar >= nChars)
101 flushBuffer();
102 }
103 }
104 }
105
106 // 将字元串s寫入到緩沖中，從s的off位置開始寫入，寫入長度是len。
107 public void write(String s, int off, int len) throws IOException {
108 synchronized (lock) {
109 ensureOpen();
110
111 int b = off, t = off + len;
112 while (b < t) {
113 int d = min(nChars - nextChar, t - b);
114 s.getChars(b, b + d, cb, nextChar);
115 b += d;
116 nextChar += d;
117 if (nextChar >= nChars)
118 flushBuffer();
119 }
120 }
121 }
122
123 // 将換行符寫入到緩沖中
124 public void newLine() throws IOException {
125 write(lineSeparator);
126 }
127
128 // 清空緩沖區資料
129 public void flush() throws IOException {
130 synchronized (lock) {
131 flushBuffer();
132 out.flush();
133 }
134 }
135
136 public void close() throws IOException {
137 synchronized (lock) {
138 if (out == null) {
139 return;
140 }
141 try {
142 flushBuffer();
143 } finally {
144 out.close();
145 out = null;
146 cb = null;
147 }
148 }
149 }
150 }