《Java语言程序设计基础教程》
T2 t2=new T2(\ T3 t3=new T3(\ t1.start(); try {
t1.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block e.printStackTrace(); }
t2.start(); try {
t2.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block e.printStackTrace(); }
t3.start(); } }
class T1 extends Thread{ private String name; public T1(String name) { this.name=name; }
public void run() {
for(int i=0;i<5;i++){ try {
sleep(5);
} catch (InterruptedException e) {
// TODO Auto-generated catch block e.printStackTrace(); }
System.out.println(this.name+\循环\ } } }
class T2 extends Thread{ private String name;
49
49
50
《Java语言程序设计基础教程》
public T2(String name) { this.name=name; }
public void run() {
for(int i=0;i<5;i++){ try {
sleep(5);
} catch (InterruptedException e) {
// TODO Auto-generated catch block e.printStackTrace(); }
System.out.println(this.name+\循环\ } } }
class T3 extends Thread{ private String name; public T3(String name) { this.name=name; }
public void run() {
for(int i=0;i<5;i++){
System.out.println(this.name+\循环\ } } }
第8章 文件和流
8.1单项选择题
1、 创建一个向文件“file.txt”追加内容的输出流对象的语句是（ A. OutputStream out=new FileOutputStream(“file.txt”);
B. OutputStream out=new FileOutputStream(“file.txt”, “append”); C. FileOutputStream out=new FileOutputStream(“file.txt”, true); D. FileOutputStream out=new FileOutputStream(new file(“file.txt”)); 50
。 ）