java try catch finally throw时出现的几种情况
2013-06-09 00:36
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import java.io.FileInputStream;
import java.io.FileNotFoundException;
//当 try 中抛出异常且 catch 中有 return 语句,
//finally 中没有 return 语句, java 先执行 catch 中非 return 语句,
//再执行 finally 语句,最后执行 catch 中 return 语句
public class Test {
public int testTry() {
FileInputStream fi = null;
try {
fi = new FileInputStream("");
} catch (FileNotFoundException fnfe) {
System.out.println("this is FileNotFoundException");
return 1;
} catch (SecurityException se) {
System.out.println("this is SecurityException");
} finally {
System.out.println("this is finally");
}
return 0;
}
public static void main(String[] args) {
Test t = new Test();
System.out.println(t.testTry());
}
}
//当 try 中抛出异常且 catch 中有 return 语句,
//finally 中也有 return 语句, java 先执行 catch 中非 return 语句,
//再执行 finally 中非 return 语句,最后执行 finally 中 return 语句,函数返回值为 finally 中返回的值。
public class Test {
public int testTry() {
FileInputStream fi = null;
try {
fi = new FileInputStream("");
} catch (FileNotFoundException fnfe) {
System.out.println("this is FileNotFoundException");
return 1;
} catch (SecurityException se) {
System.out.println("this is SecurityException");
return 0;
} finally {
System.out.println("this is finally");
return 3;
}
}
public static void main(String[] args) {
Test t = new Test();
System.out.println(t.testTry());
}
}
//Throw (是 catch 中还是非 catch 中)后面不能再跟 code ,否则编译不能通过
public class Test {
public static void main(String[] args) {
Test t = new Test();
try {
System.out.println(t.testTry());
} catch (Exception e) {
System.out.println("this is exception");
}
}
public int testTry() throws Exception {
FileInputStream fi = null;
try {
fi = new FileInputStream("");
} catch (FileNotFoundException fnfe) {
System.out.println("this is FileNotFoundException");
throw new Exception();
//return 1; //次行不注释就报错
} finally {
System.out.println("this is finally");
}
return 0;
}
}
import java.io.FileNotFoundException;
//当 try 中抛出异常且 catch 中有 return 语句,
//finally 中没有 return 语句, java 先执行 catch 中非 return 语句,
//再执行 finally 语句,最后执行 catch 中 return 语句
public class Test {
public int testTry() {
FileInputStream fi = null;
try {
fi = new FileInputStream("");
} catch (FileNotFoundException fnfe) {
System.out.println("this is FileNotFoundException");
return 1;
} catch (SecurityException se) {
System.out.println("this is SecurityException");
} finally {
System.out.println("this is finally");
}
return 0;
}
public static void main(String[] args) {
Test t = new Test();
System.out.println(t.testTry());
}
}
//当 try 中抛出异常且 catch 中有 return 语句,
//finally 中也有 return 语句, java 先执行 catch 中非 return 语句,
//再执行 finally 中非 return 语句,最后执行 finally 中 return 语句,函数返回值为 finally 中返回的值。
public class Test {
public int testTry() {
FileInputStream fi = null;
try {
fi = new FileInputStream("");
} catch (FileNotFoundException fnfe) {
System.out.println("this is FileNotFoundException");
return 1;
} catch (SecurityException se) {
System.out.println("this is SecurityException");
return 0;
} finally {
System.out.println("this is finally");
return 3;
}
}
public static void main(String[] args) {
Test t = new Test();
System.out.println(t.testTry());
}
}
//Throw (是 catch 中还是非 catch 中)后面不能再跟 code ,否则编译不能通过
public class Test {
public static void main(String[] args) {
Test t = new Test();
try {
System.out.println(t.testTry());
} catch (Exception e) {
System.out.println("this is exception");
}
}
public int testTry() throws Exception {
FileInputStream fi = null;
try {
fi = new FileInputStream("");
} catch (FileNotFoundException fnfe) {
System.out.println("this is FileNotFoundException");
throw new Exception();
//return 1; //次行不注释就报错
} finally {
System.out.println("this is finally");
}
return 0;
}
}
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