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cd ~/demo-java-app
cat >> src/main/java/com/demo/App.java << 'EOF'
public static double divide(int a, int b) {
if (b == 0) {
throw new ArithmeticException("Division by zero!");
}
return (double) a / b;
}
EOF
cat > src/main/java/com/demo/App.java << 'EOF'
package com.demo;
public class App {
public static void main(String[] args) {
System.out.println("===================================");
System.out.println(" Demo Java Application v1.0");
System.out.println("===================================");
System.out.println("Application started successfully!");
}
public static int add(int a, int b) {
return a + b;
}
public static int subtract(int a, int b) {
return a - b;
}
public static int multiply(int a, int b) {
return a * b;
}
public static double divide(int a, int b) {
if (b == 0) {
throw new ArithmeticException("Division by zero!");
}
return (double) a / b;
}
}
EOF
cat > src/test/java/com/demo/AppTest.java << 'EOF'
package com.demo;
public class AppTest {
public static void main(String[] args) {
System.out.println("Running tests...");
// 测试 add 方法
int result1 = App.add(2, 3);
assert result1 == 5 : "add(2,3) should be 5, but got " + result1;
System.out.println("✅ Test add(2,3) = 5: PASSED");
// 测试 subtract 方法
int result2 = App.subtract(10, 4);
assert result2 == 6 : "subtract(10,4) should be 6, but got " + result2;
System.out.println("✅ Test subtract(10,4) = 6: PASSED");
// 测试 multiply 方法
int result3 = App.multiply(3, 4);
assert result3 == 12 : "multiply(3,4) should be 12, but got " + result3;
System.out.println("✅ Test multiply(3,4) = 12: PASSED");
// 测试 divide 方法
double result4 = App.divide(10, 3);
assert Math.abs(result4 - 3.333333) < 0.001 : "divide(10,3) ≈ 3.333";
System.out.println("✅ Test divide(10,3) ≈ 3.333: PASSED");
// 测试边界情况
int result5 = App.add(0, 0);
assert result5 == 0 : "add(0,0) should be 0, but got " + result5;
System.out.println("✅ Test add(0,0) = 0: PASSED");
System.out.println("");
System.out.println("All tests passed! ✅");
}
}
EOF
git add -A
git commit -m "feat: 新增 divide 除法方法及测试"
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