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重新编写exception一章的ppt文件
1 parent b77a221 commit bfacb9c

6 files changed

Lines changed: 3838 additions & 50 deletions

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‎guide/code/exception/src/cn/edu/sdut/softlab/exception/DivTest.java‎

Lines changed: 24 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -7,30 +7,28 @@
77
*/
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public class DivTest {
99

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/**
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* 程序执行入口.
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*
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* @param args 命令行参数
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*/
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public static void main(String[] args) {
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try {
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int a = Integer.parseInt(args[0]);
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int b = Integer.parseInt(args[1]);
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int c = a / b;
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System.out.println("您输入的两个数相除的结果是： " + c);
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} catch (ArrayIndexOutOfBoundsException e) {
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System.out.println("数组越界，运行程序时输入的参数个数不对。应该输入2个参数，您输入的参数个数是：" + args.length);
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e.printStackTrace();
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} catch (NumberFormatException e) {
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System.out.println("数字格式异常，程序只能接受整数形式的参数");
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e.printStackTrace();
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} catch (ArithmeticException e) {
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System.out.println("数学异常，除数不能为0");
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e.printStackTrace();
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} catch (Exception e) {
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System.out.println("天知道发生了什么，总之情况不对");
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e.printStackTrace();
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}
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}
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/**
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* 程序执行入口.
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*
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* @param args 命令行参数
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*/
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public static void main(String[] args) {
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try {
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int a = Integer.parseInt(args[0]);
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int b = Integer.parseInt(args[1]);
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System.out.println("a/b = " + a / b);
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} catch (ArrayIndexOutOfBoundsException e) {
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System.out.println("数组越界，运行程序时输入的参数个数不对。应该输入2个参数，您输入的参数个数是：" + args.length);
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e.printStackTrace();
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} catch (NumberFormatException e) {
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System.out.println("数字格式异常，程序只能接受整数形式的参数");
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e.printStackTrace();
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} catch (ArithmeticException e) {
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System.out.println("数学异常，除数不能为0");
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e.printStackTrace();
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} catch (Exception e) {
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System.out.println("天知道发生了什么，总之情况不对");
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e.printStackTrace();
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}
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}
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}

‎guide/code/exception/src/cn/edu/sdut/softlab/exception/DivTestCLike.java‎

Lines changed: 30 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,30 @@
1+
package cn.edu.sdut.softlab.exception;
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public class DivTestCLike {
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public static void main(String[] args) {
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if(args.length != 2){
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System.out.println("请提供2个参数!");
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return;
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}
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if(args[1].equalsIgnoreCase("0")){
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System.out.println("除数不能为0!");
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return;
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}
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// 判断args[0]和args[1]是整数形式的字符串
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if(!isIntegerStr(args[0]) || !isIntegerStr(args[1])) {
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System.out.println("两个参数的格式不合法,无法转换为整数");
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return;
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}
20+
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int a = Integer.parseInt(args[0]);
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int b = Integer.parseInt(args[1]);
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System.out.println("a/b = " + a/b);
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}
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private static boolean isIntegerStr(String arg) {
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// TBD
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return true;
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}
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}

‎guide/code/exception/src/cn/edu/sdut/softlab/exception/DivTestNoException.java‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,6 @@ public class DivTestNoException {
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public static void main(String[] args) {
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int a = Integer.parseInt(args[0]);
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int b = Integer.parseInt(args[1]);
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int c = a / b;
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System.out.println("您输入的两个数相除的结果是： " + c);
18+
System.out.println("a/b = " + a/b);
2019
}
2120
}

‎guide/imgs/exception/java-style-exception-blocks.dia‎

1.5 KB
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