Let me walk you through what happens when you open JavaBox in a browser tab. Your browser loads a Cloudflare Worker. That Worker serves a 227MB WebAssembly blob. That blob contains an Emscripten-compiled build of QEMU. QEMU boots a Linux kernel. The Linux kernel boots Alpine Linux 3.21. Alpine Linux has OpenJDK 21 on it. And OpenJDK compiles and runs your Java code.
第一百三十二条 出租人应当提供约定的船舶；经承租人同意，可以更换船舶。出租人提供或者更换的船舶不符合合同约定的，承租人有权拒绝或者解除合同。
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