JAVA 类 直角三角形

下面是四种打印直角三角形的Java代码示例：
示例1 - 打印正直角三角形：

public static void main(String[] args) {
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < i + 1; j++) {
            System.out.print("*");
        }
        System.out.println();
    }
}

示例2 - 打印倒直角三角形：

public static void main(String[] args) {
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 5 - i; j++) {
            System.out.print("*");
        }
        System.out.println();
    }
}

示例3 - 打印正直角三角形（反）：

public static void main(String[] args) {
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 5 - i; j++) {
            System.out.print(" ");
        }
        for (int j = 0; j < i + 1; j++) {
            System.out.print("*");
        }
        System.out.println();
    }
}

示例4 - 打印倒直角三角形（反）：

public static void main(String[] args) {
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < i + 1; j++) {
            System.out.print(" ");
        }
        for (int j = 0; j < 5 - i; j++) {
            System.out.print("*");
        }
        System.out.println();
    }
}

其中，示例1和示例2分别打印正直角三角形和倒直角三角形，示例3和示例4分别打印正直角三角形（反）和倒直角三角形（反）。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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