nested if-else 嵌套语句这意味着您可以在另一个if or else if语句中使用一个if or else if语句。
nested if - 语法
if(Boolean_expression 1) { //当布尔表达式 1 为true时执行 if(Boolean_expression 2) { //当布尔表达式 2 为true时执行 } }
nested if - 示例
public class Test {
public static void main(String args[]) {
int x=30;
int y=10;
</span><span class="kwd">if</span><span class="pun">(</span><span class="pln"> x </span><span class="pun">==</span><span class="pln"> </span><span class="lit">30</span><span class="pln"> </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">if</span><span class="pun">(</span><span class="pln"> y </span><span class="pun">==</span><span class="pln"> </span><span class="lit">10</span><span class="pln"> </span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="kwd">print</span><span class="pun">(</span><span class="str">"X=30 and Y=10"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
</span><span class="pun">}</span><span class="pln">
}
}
这将产生以下输出-
X=30 and Y=10
