动手动脑一
1》源代码：
public class Elementary {
public static void main(String[] args) {
try{
try{
throw new ArrayIndexOutOfBoundsException();
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println("ArrayIndexOutOfBoundsException"+"/内层是try-catch");
}
throw new ArithmeticException();
}
catch (ArithmeticException e)
{
System.out.println("发生了ArithmeticException");
}
catch(ArrayIndexOutOfBoundsException f)
{
System.out.println("ArrayIndexOutOfBoundsException"+"/外层是try-catch");
}
}
}
结果截图：
动手动脑二
1》源代码：
import javax.swing.*;
public class Option {
public static void main(String[] args) {
try{
try{
throw new ArrayIndexOutOfBoundsException();
}
catch(ArithmeticException e)
{
System.out.println("ArrayIndexOutOfBoundsException"+"/内层是try-catch");
}
throw new ArithmeticException();
}
catch (ArithmeticException e)
{
System.out.println("发生了ArithmeticException");
}
catch(ArrayIndexOutOfBoundsException f)
{
System.out.println("ArrayIndexOutOfBoundsException"+"/外层是try-catch");
}
}
}
实验截图：
课后作业
1》源代码：
import java.util.Scanner;
public class 成绩判断 {
public static void main(String[] args) {
// TODO 自动生成的方法存根
double score = 0;
boolean badInput = true;
Scanner input;
while(badInput) {
System.out.println("请输入1个数字：");
input = new Scanner(System.in);
try {
score=input.nextDouble();
}
catch(Exception e) {
System.out.println("您输入的不是数字！");
continue;
}
badInput = false;
}
panduan(score);
}
private static void panduan(double score) {
// TODO 自动生成的方法存根
if(score>=90)
System.out.println("优");
else if(score>=80)
System.out.println("良");
else if(score>=70)
System.out.println("中");
else if(score>=60)
System.out.println("及格");
else
System.out.println("不及格");
}
}
2》实验截图：
